Biomedical subjects

Dan K Kiely

Publications and source records attributed to Dan K Kiely.

At least 19 recordsLinked to original sources

PubMed2006

Enhanced vasoreactivity and its response to antihypertensive therapy in hypertensive elderly women.

Several previous studies have demonstrated sex differences in cardiovascular autonomic control in healthy young women, but little is known about the regulation of blood pressure in hypertensive elderly women, who have the greatest risk of adverse cardiovascular events. Therefore, we examined sex differences in physiological responses to upright tilt in 21 healthy (13 men and 8 women), 22 controlled hypertensive (10 men and 12 women), and 18 uncontrolled hypertensive (9 men and 9 women) elderly men and women. Of these, 19 normotensives, 18 controlled hypertensives, and 14 uncontrolled hypertensives completed 6 months of observation or pharmacological therapy for uncontrolled hypertension. All of the subjects underwent continuous monitoring of cardiac (RR) interval (ECG), finger arterial pressure (photoplethysmography), and stroke volume (transthoracic impedance) and periodic measurements of forearm blood flow (venous occlusion plethysmography) while resting supine and during a graded head-up tilt. Blood pressure and RR-interval power spectra were computed. Baroreflex gain was estimated by the cross-spectral and sequence methods. In contrast to other groups, elderly hypertensive women increased systemic vascular resistance during tilt. This response was associated with greater low-frequency systolic pressure variability, a presumed marker of sympathetic vascular control. After 6 months of successful antihypertensive therapy, women showed attenuation of the systemic vascular resistance response and a reduction in low-frequency systolic blood pressure variability to levels similar to men and normotensive controls. These results highlight the beneficial effects of antihypertensive therapy on the systemic vasculature, particularly for elderly women in whom enhanced vasoreactivity may contribute to excessive cardiovascular morbidity and mortality.

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PubMed2006

Does gynecologic surgery contribute to low back problems in later life? An analysis of the women's health and aging study.

OBJECTIVE: To examine whether women with potential injuries to the abdominal and pelvic musculature from past gynecologic surgery are at higher risk for low back pain (LBP). DESIGN: Cross-sectional population-based study. SETTING: Eastern region of the city and county of Baltimore, MD. PARTICIPANTS: Disabled women (N=1002) aged 65 and older, 448 of whom reported gynecologic surgery who were participants in the Women's Health and Aging Study. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: LBP presence in the last year, LBP severity for the last month, and adjudicated lumbar diagnoses (disk disease, stenosis) were examined in relation to reports of surgical menopause or ovarian surgery adjusted for LBP risk factors. RESULTS: Women with surgical menopause experienced more moderate LBP (adjusted odds ratio [AOR]=1.59; 95% confidence interval [CI], 1.1-2.3) than women without surgical menopause. Women with ovarian surgery also experienced more moderate LBP than women without ovarian surgery, but this association was not statistically significant (AOR=1.39; 95% CI, 0.96-2.09). Gynecologic surgery was not associated with an increased likelihood of lumbar disk disease or stenosis. CONCLUSIONS: Surgical menopause may increase the risk of moderate LBP. Further research is needed to determine how gynecologic surgery might influence low back pathology. Abdominal and pelvic muscle rehabilitation after gynecologic surgery may provide protection from LBP later in life.

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PubMed2006

Association between delirium resolution and functional recovery among newly admitted postacute facility patients.

BACKGROUND: Delirium is common among hospitalized elders and may persist for months. The adverse impact of delirium on independence may increasingly occur in the postacute care (PAC) setting. The purpose of this study is to examine the association between delirium resolution and functional recovery in skilled nursing facilities specializing in PAC. METHODS: Patients were screened for delirium on admission after an acute hospitalization at PAC facilities. Only patients with "Confusion Assessment Method"-defined delirium were enrolled. Delirium and activities of daily living were assessed prehospital, at PAC admission, and at four (2-week, and 1-, 3-, and 6-month) follow-up assessments to measure functional ability. Four distinct delirium resolution groups were created ranging from resolution within 2 weeks without recurrence to no resolution over 6 months. Repeated-measures analysis of covariance was used to determine if functional performance differed over time by delirium resolution status. RESULTS: Among the 393 PAC patients, functional recovery differed significantly (p <.0001) by delirium resolution status. Patients who resolved their delirium by 2 weeks without recurrence regained 100% of their prehospital functional level, whereas patients who never resolved their delirium retained less than 50% of their prehospital functional level. Patients with slower resolving delirium and recurrent delirium had intermediate functional outcomes. CONCLUSIONS: Resolution of delirium among PAC patients appears to be a prerequisite for functional recovery. Delirium resolution within 2 weeks without recurrence is associated with excellent functional recovery. Effective strategies to resolve delirium promptly and prevent its recurrence in the PAC setting will likely benefit patient rehabilitation and functional recovery.

Activities of Daily Living↗

PubMed2006

Nursing home patients in the intensive care unit: Risk factors for mortality.

OBJECTIVE: To determine intensive care unit (ICU) admission characteristics predictive of mortality among older nursing home residents. DESIGN: Retrospective cohort study. SETTING: A 725-bed teaching nursing home and two teaching-hospital ICUs. PATIENTS: One hundred twenty-three nursing home residents > or =75 yrs admitted to the ICU between July 1, 1999, and September 30, 2003. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Characteristics of nursing home residents admitted to the ICU were identified by medical record review at the nursing home and the hospital. Additionally, the minimum data set was used to calculate preadmission functional status using the Activities of Daily Living-Long Form (ADL-L) and cognitive status with the Cognitive Performance Scale (CPS). Our primary outcomes were hospital mortality and mortality within 90 days of ICU admission. The nursing home residents admitted to the ICU were old (87.7 +/- 5.4 yrs) with impaired cognition (CPS 2.8 +/- 1.7, range 0-6, where 6 = most impaired) and moderately dependent function (ADL-L 14.5 +/- 9.4, range 0-28, where 28 = total dependence). Of the 123 patients, 33 (27%) died in the hospital, whereas 90 (73%) survived to hospital discharge. Acute Physiology and Chronic Health Evaluation (APACHE) III score was independently associated with significantly increased odds of hospital mortality (adjusted odds ratio 1.04; 95% confidence interval 1.02, 1.07). Among the 90 patients who survived to return to the nursing home, 34 (37.8%) died within 90 days. Cox regression demonstrated that higher APACHE III score (adjusted risk ratio 1.02; 95% confidence interval 1.01, 1.04) and increasing functional dependency before ICU admission (adjusted risk ratio 1.6; 95% confidence interval 1.05, 2.57, per ADL-L quartile) were independently associated with increased mortality rate within 90 days. CONCLUSIONS: Among vulnerable elderly nursing home residents, higher APACHE III score is independently associated with increased hospital mortality rate and mortality within 90 days. Among hospital survivors, impaired functional status is independently associated with increased mortality rate within 90 days.

Activities of Daily Living↗

PubMed2006

Occurrence and treatment of suspected pneumonia in long-term care residents dying with advanced dementia.

OBJECTIVES: To describe the occurrence and management of suspected pneumonia in end-stage dementia and to identify factors associated with aggressiveness of antibiotic treatment. DESIGN: Retrospective cohort study. SETTING: A 675-bed long-term-care facility in Boston, Massachusetts. PARTICIPANTS: Two hundred forty subjects aged 65 and older who died with advanced dementia between January 2001 and December 2003. Subjects who had suspected pneumonia during the last 6 months of life were identified. MEASUREMENTS: Independent variables included subject characteristics and features of suspected pneumonia episodes. These variables were obtained from medical records. Antibiotic treatment for each episode was determined. Multivariate analysis was used to identify independent variables associated with aggressiveness of treatment. RESULTS: One hundred fifty-four (64%) subjects with advanced dementia experienced 229 suspected pneumonia episodes during the last 6 months of life. Within 30 days of death, 53% of subjects had suspected pneumonia. Antibiotic treatment for the 229 episodes was as follows: none, 9%; oral only, 37%; intramuscular, 25%; and intravenous, 29%. Factors independently associated with more-invasive therapy were lack of a do-not-hospitalize order (adjusted odds ratio (AOR) = 3.24, 95% confidence interval (CI) = 2.02-5.22), aspiration (AOR = 2.75, 95% CI = 1.44-5.26), primary language not English (AOR = 2.21, 95% CI = 1.17-4.15), and unstable vital signs (AOR = 2.02, 95% CI = 1.10-3.72). CONCLUSION: Pneumonia is a common terminal event in advanced dementia for which many patients receive parenteral antibiotics. The aggressiveness of treatment is most strongly determined by advance care planning, the patient's cultural background, and clinical features of the suspected pneumonia episode.

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PubMed2006

Satisfaction with end-of-life care for nursing home residents with advanced dementia.

OBJECTIVES: To identify factors associated with satisfaction with care for healthcare proxies (HCPs) of nursing home (NH) residents with advanced dementia. DESIGN: Cross-sectional study. SETTING: Thirteen NHs in Boston. PARTICIPANTS: One hundred forty-eight NH residents aged 65 and older with advanced dementia and their formally designated HCPs. MASUREMENTS: The dependent variable was HCPs' score on the Satisfaction With Care at the End of Life in Dementia (SWC-EOLD) scale (range 10-40; higher scores indicate greater satisfaction). Resident characteristics analyzed as independent variables were demographic information, functional and cognitive status, comfort, tube feeding, and advance care planning. HCP characteristics were demographic information, health status, mood, advance care planning, and communication. Multivariate stepwise linear regression was used to identify factors independently associated with higher SWC-EOLD score. RESULTS: The mean ages+/-standard deviation of the 148 residents and HCPs were 85.0+/-8.1 and 59.1+/-11.7, respectively. The mean SWC-EOLD score was 31.0+/-4.2. After multivariate adjustment, variables independently associated with greater satisfaction were more than 15 minutes discussing advance directives with a care provider at the time of NH admission (parameter estimate=2.39, 95% confidence interval (CI)=1.16-3.61, P<.001), greater resident comfort (parameter estimate=0.10, 95% CI=0.02-0.17, P=.01), care in a specialized dementia unit (parameter estimate=1.48, 95% CI=0.25-2.71, P=.02), and no feeding tube (parameter estimate=2.87, 95% CI=0.46-5.25, P=.02). CONCLUSION: Better communication, greater resident comfort, no tube feeding, and care in a specialized dementia unit are modifiable factors that may improve satisfaction with care in advanced dementia.

Adult↗

PubMed2005

Antihypertensive therapy increases cerebral blood flow and carotid distensibility in hypertensive elderly subjects.

Many physicians are reluctant to lower blood pressure to recommended levels in elderly hypertensive patients because of concern about producing cerebral hypoperfusion. Because hypertension is associated with potentially reversible structural and functional alterations in the cerebral circulation that may improve with treatment, we investigated whether long-term pharmacological reduction of systolic blood pressure will improve, rather than worsen, cerebral blood flow and its regulation. Three groups of elderly subjects 65 years of age or older were studied prospectively: normotensive subjects (N=19), treated hypertensive subjects with systolic pressure <140 mm Hg (N=18), and uncontrolled hypertensive subjects with systolic pressure >160 mm Hg at entry into the study (N=14). We measured beat-to-beat blood flow velocity in the middle cerebral artery (transcranial Doppler ultrasonography), finger arterial pressure (photoplethysmography), and pulsatile distensibility of the carotid artery (duplex Doppler ultrasonography) at baseline and after 6 months of observation or antihypertensive therapy. After baseline hemodynamic measurements, uncontrolled hypertensive subjects underwent aggressive treatment with lisinopril with or without hydroclorothiazide or, if not tolerated, nifedipine or an angiotensin receptor blocker to bring their systolic pressure <140 mm Hg for 6 months. The other 2 groups were observed for 6 months. After 6 months of successful treatment, uncontrolled hypertensive subjects had significant increases in cerebral blood flow velocity and carotid distensibility that was not seen in the other groups. Treatment reduced cerebrovascular resistance and did not impair cerebral autoregulation. Therefore, judicious long-term treatment of systolic hypertension in otherwise healthy elderly subjects does not cause cerebral hypoperfusion.

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PubMed2005

Upper and lower limb muscle power relationships in mobility-limited older adults.

BACKGROUND: Lower limb muscle power impairments are modifiable factors underlying mobility limitations in older adults. This study examined relationships between upper and lower limb muscle power and their role in predicting mobility performance among community-dwelling older adults. METHODS: A cross-sectional analysis was conducted. Participants included 37 mobility-limited adults (24 women, 13 men), aged 65 to 93 years. Measures included upper (elbow extension) and lower limb (double leg press) one repetition maximum (1RM), and muscle power at both 40% and 70% one repetition maximum. Physical performance measures included stair climb time, the Short Physical Performance Battery, and 4-meter walk time. Factors commonly mediating the relationship between impairments and physical performance were analyzed as covariates. RESULTS: Participants had a mean age of 76 years, had five chronic medical conditions, and manifested moderate mobility limitations. Although the associations between the upper and lower limbs were strong (p <.001), the magnitude of association was greater for power (r =.88-.89) as compared to strength (r =.69). Multivariate regression analyses revealed consistently strong relationships between limb muscle power and mobility performance measures. Substituting upper for lower limb power within these models did not materially weaken the relationships. CONCLUSION: Muscle power appears to be a more generalized attribute between the upper and lower limbs than is muscle strength, suggesting that mechanisms underlying velocity of movement, as opposed to force production, may be important factors underlying muscle power in elderly persons. Additionally, upper limb muscle power measures may serve as a useful surrogate measure of limb power having implications for clinicians and researchers.

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PubMed2005

Outcomes of older people admitted to postacute facilities with delirium.

OBJECTIVES: To compare outcomes of patients admitted to postacute skilled nursing facilities with delirium, subsyndromal delirium, and no delirium. DESIGN: Observational cohort study. SETTING: Seven skilled nursing facilities that specialize in postacute care within a single metropolitan region. PARTICIPANTS: Five hundred four subjects chosen from 1,248 consenting subjects aged 65 and older who underwent mental status testing within 5 days of admission to the participating facilities. Subjects who met full Confusion Assessment Method (CAM) criteria were classified as delirious, those with one or more CAM criteria were classified as having subsyndromal delirium, and those with no CAM features were classified as having no delirium. All subjects with delirium and with available medical records were included. A random subset of subjects with no delirium and subsyndromal delirium with available medical records was included. MEASUREMENTS: The medical records of all subjects underwent a structured review by trained research nurses who were masked to the subjects' initial delirium status. Records were reviewed for the development of new complications within the postacute setting and to determine whether the subjects were discharged within 30 days and, if so, the discharge destination. The National Death Index was used to assess 6-month mortality. RESULTS: Subjects with delirium were more likely to experience one or more complications than subjects with no delirium (73% vs 41%, P < .01). Within 30 days of postacute admission, subjects with delirium were more than twice as likely to be rehospitalized (30% vs 13%), and less than half as likely to be discharged to the community (30% vs 73%) than subjects without delirium (differences P < .01). Subjects with subsyndromal delirium had outcomes intermediate between those with and without delirium. Finally, subjects admitted to the postacute setting with delirium experienced a 6-month mortality rate of 25.0%, compared with 5.7% in subjects admitted without delirium. Subjects with subsyndromal delirium had a 6-month mortality rate of 18.3%. CONCLUSION: Patients admitted to postacute skilled nursing facilities with delirium are more likely to experience complications, rehospitalization, and death than patients without delirium. These findings support the need for improved case finding and management of delirium in postacute care.

Accidental Falls↗

PubMed2005

Decisions to hospitalize nursing home residents dying with advanced dementia.

OBJECTIVES: To describe the prevalence of, timing of, and factors associated with decisions not to hospitalize nursing home residents with advanced dementia who were dying. DESIGN: Retrospective cohort study. SETTING: Six hundred seventy five-bed nursing facility in Boston. PARTICIPANTS: Two hundred forty residents in a teaching nursing home who died between January 2001 and December 2003 with advanced dementia. MEASUREMENTS: The prevalence and timing of do-not-hospitalize (DNH) orders were determined from the medical record. Data describing demographic characteristics, health conditions, advance care planning, sentinel events, and health services usage during the last 6 months of life were examined. Factors associated with having a DNH order were identified. RESULTS: At the time of death, 83.8% of subjects had a DNH order. The prevalence of DNH orders was 50.0% and 34.4%, 30 and 180 days before death, respectively. Hospital transfers were common during the last 6 months of life (24.6%). Factors independently associated with having a DNH order before death included surrogate decision-maker was not the subject's child (adjusted odds ratio (AOR)=4.39, 95% confidence interval (CI)=1.52-12.66), eating problems (AOR=4.17, 95% CI=1.52-11.47), aged 92 and older (AOR=2.78, 95% CI=1.29-5.96), and length of stay 2 years or longer (AOR=2.34, 95% CI=1.11-4.93). CONCLUSION: For most institutionalized persons with advanced dementia, a decision to forgo hospitalization is not made until death is imminent. Thus, hospital transfers are common near the end of life. The finding that DNH orders are associated with patient and surrogate factors can help clinicians identify cases in which decisions to forgo hospitalizations may be facilitated.

Age Factors↗

PubMed2005

A model for management of delirious postacute care patients.

Although delirium has been shown to be a common, morbid, and costly problem for hospitalized older people, evidence has mounted that it may persist for weeks or months. Therefore, concern about delirium can no longer be confined to acute care. After an acute hospitalization, many older people are discharged to postacute care (PAC) facilities--rehabilitation hospitals and skilled nursing facilities. Although several models designed to prevent delirium in the hospital setting have been described, there have been few such efforts in the PAC setting. This article describes the development of a multifactorial delirium abatement program (DAP), a new model of care for older patients admitted to the postacute skilled nursing facility with delirium. The DAP is a nurse-led, unit-based intervention. The program consists of four modules based on best practices as defined by the peer-reviewed literature: standardized screening for symptoms and signs of delirium upon admission to the PAC unit, assessment and treatment of possible causes of and contributors to delirium, prevention and management of common delirium complications, and restoration of patient cognitive and self-care function. This article also presents the process of facility introduction, staff education on DAP content, and multidisciplinary outreach. Key strategies for DAP implementation are reviewed. Program adoption challenges and corresponding model refinements to enhance adherence and overall care quality are highlighted. Last, clinical adaptation of this research-derived program is discussed.

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PubMed2004

Estimating prognosis for nursing home residents with advanced dementia.

CONTEXT: Survival varies for patients with advanced dementia, and accurate prognostic tools have not been developed. A small proportion of patients admitted to hospice have dementia, in part because of the difficulty in predicting survival. OBJECTIVES: To identify factors associated with 6-month mortality in newly admitted nursing home residents with advanced dementia and to create a practical risk score to predict 6-month mortality in this population. DESIGN, SETTING, AND PARTICIPANTS: This was a retrospective cohort study of data from the Minimum Data Set (MDS). All Medicare or Medicaid licensed nursing homes in New York and Michigan were included. Participants had advanced dementia and were admitted to New York nursing homes between June 1, 1994, and December 30, 1998 (derivation cohort, n = 6799), and to Michigan nursing homes from October 1, 1998, through July 30, 2000 (validation cohort, n = 4631). MAIN OUTCOME MEASURES: MDS factors associated with 6-month mortality were determined in the derivation group, and the resulting mortality risk score was evaluated in the validation cohort. Risk score performance was compared with the cut point of 7c on the Functional Assessment Staging (FAST) scale. RESULTS: Among residents with advanced dementia, 28.3% (n = 1922) died within 6 months of nursing home admission in the derivation cohort; 35.1% (n = 1626) died in the validation cohort. The 6-month mortality rate increased across risk scores (possible range, 0-19): 0 points, 8.9% mortality; 1 to 2, 10.8%; 3 to 5, 23.2%; 6 to 8, 40.4%; 9 to 11, 57.0%; and at least 12, 70.0% in the validation cohort. The area under the receiver operating characteristic (AUROC) curve for predicting 6-month mortality was 0.74 and 0.70 in the derivation and validation cohorts, respectively. Our risk score demonstrated better discrimination to predict 6-month mortality (AUROC, 0.64 for a cutoff of > or =6 points vs 0.51 for FAST stage 7c). CONCLUSION: A risk score based on 12 variables from the MDS estimates 6-month mortality for nursing home residents with advanced dementia with greater accuracy than existing prognostic guidelines.

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PubMed2004

Dying with advanced dementia in the nursing home.

BACKGROUND: Nursing homes are important providers of end-of-life care to persons with advanced dementia. METHODS: We used data from the Minimum Data Set (June 1, 1994, to December 31, 1997) to identify persons 65 years and older who died with advanced dementia (n = 1609) and terminal cancer (n = 883) within 1 year of admission to any New York State nursing home. Variables from the Minimum Data Set assessment completed within 120 days of death were used to describe and compare the end-of-life experiences of these 2 groups. RESULTS: At nursing home admission, only 1.1% of residents with advanced dementia were perceived to have a life expectancy of less than 6 months; however, 71.0% died within that period. Before death, 55.1% of demented residents had a do-not-resuscitate order, and 1.4% had a do-not-hospitalize order. Nonpalliative interventions were common among residents dying with advanced dementia: tube feeding, 25.0%; laboratory tests, 49.2%; restraints, 11.2%; and intravenous therapy, 10.1%. Residents with dementia were less likely than those with cancer to have directives limiting care but were more likely to experience burdensome interventions: do-not-resuscitate order (adjusted odds ratio [OR], 0.12; 95% confidence interval [CI], 0.09-0.16), do-not-hospitalize order (adjusted OR, 0.33; 95% CI, 0.16-0.66), tube feeding (adjusted OR, 2.21; 95% CI, 1.51-3.23), laboratory tests (adjusted OR, 2.53; 95% CI, 2.01-3.18), and restraints (adjusted OR, 1.79; 95% CI, 1.23-2.61). Distressing conditions common in advanced dementia included pressure ulcers (14.7%), constipation (13.7%), pain (11.5%), and shortness of breath (8.2%). CONCLUSIONS: Nursing home residents dying with advanced dementia are not perceived as having a terminal condition, and most do not receive optimal palliative care. Management and educational strategies are needed to improve end-of-life care in advanced dementia.

Advance Directives↗

PubMed2004

Is pulse pressure a predictor of cardiovascular complications in a frail elderly nursing home population?

BACKGROUND AND AIMS: Previous studies have focused on systolic blood pressure (SBP), diastolic pressure (DBP), and more recently pulse pressure (PP) as risk factors for adverse cardiovascular (CV) endpoints in elderly people. However, the relation between these pressures and CV complications in the frail nursing home population has not been well studied. The aims of this project are to determine the value of PP in predicting CV complications in a nursing home population, and to compare its predictive value with SBP, DBP, and mean arterial pressure (MAP). METHODS: This study is a retrospective 2-year review of the medical charts of 248 residents of the Hebrew Rehabilitation Center for the Aged, a long-term care facility in Boston, MA, USA. During the review process, data were collected about past medical history and new onset CV events, in addition to blood pressure and medication use. RESULTS: The results showed, with 95% confidence, that within a 2-year period, the odds ratio for the occurrence of the selected CV outcomes (myocardial infarction, congestive heart failure, angina, stroke, renal failure, syncope, death) included 1.0 for PP, SBP, DBP, MAP, and changes in these values. After adjusting for medication use, pulse pressure was still not an independent risk factor for CV complications. CONCLUSIONS: PP, SBP, DBP or MAP cannot serve as predictors of CV outcomes in the nursing home population. The presence of multiple medical problems in this frail population may have resulted in CV morbidity and mortality, independent of blood pressure effects.

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PubMed2004

Characteristics associated with delirium persistence among newly admitted post-acute facility patients.

BACKGROUND: Delirium is costly, common, and may persist for weeks or months. Therefore, the adverse impact of delirium on loss of independence may occur in the post-acute setting rather than in the hospital. The purpose of this study is to describe the rate of delirium persistence and identify baseline patient characteristics that are associated with delirium persistence at 1 month among newly admitted post-acute facility patients who were admitted with delirium. METHODS: Patients were recruited from 4 Boston area skilled nursing facilities specializing in post-acute care (PAC). Assessment instruments included the Confusion Assessment Method Diagnostic Algorithm, the modified Delirium Symptom Interview, the Memorial Delirium Assessment Scale (MDAS), and the Blessed Dementia Rating Scale (BDRS). Multiple logistic regression analyses were used to identify patient characteristics associated with delirium persistence (at 1 month). RESULTS: Nearly 51% of the 85 delirious patients enrolled in this study had delirium at their 1-month follow-up assessment. Four patient factors associated with delirium persistence were identified: older age (> or =85 years), severe delirium at PAC admission (MDAS score >15), prehospital cognitive impairment based on proxy report [BDRS], and the presence of all 8 modified Delirium Symptom Interview symptoms at PAC admission. Our model has very good predictive power (area under the receiver operating characteristic = 0.85). CONCLUSIONS: Delirium is persistent in the post-acute setting. If verified in further research, the risk factors found in this study could be used to identify patients who are likely to have delirium after 1 month, and may prove useful in developing and targeting interventions of care.

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PubMed2004

Increased Velocity Exercise Specific to Task (InVEST) training: a pilot study exploring effects on leg power, balance, and mobility in community-dwelling older women.

OBJECTIVES: To evaluate a dynamic form of weighted vest exercise suitable for home use and designed to enhance muscle power, balance, and mobility. DESIGN: A single-blind, randomized, controlled trial. SETTING: Outpatient exercise research facility situated within an academic long-term care center. PARTICIPANTS: Twenty-one community-dwelling women aged 70 and older with a Short Physical Performance Battery (SPPB) score between 4 and 10 (out of 12). INTERVENTIONS: Subjects were randomized into a progressive resistance-training program using weighted vests for resistance with exercises designed to be specific to mobility tasks and have a component performed at the fastest possible velocity (Increased Velocity Exercise Specific to Task (InVEST), n=11) or a control exercise group (control, n=10), which performed slow-velocity, low-resistance exercise. Both groups exercised three times a week for 12 weeks. MEASUREMENTS: Changes in muscle power, balance, and physical performance were compared. RESULTS: In comparison to control group, InVEST group manifested significant improvements (P<.05) in leg power across measurements obtained at 75% to 90% of the one-repetition maximum. Both groups demonstrated significant improvements in chair stand and SPPB score from baseline, and the InVEST group showed significant improvements in gait speed and chair stand from baseline (P<.05). InVEST produced significantly greater changes in chair stand time than control (P<.05). CONCLUSION: InVEST training appears be an effective means of enhancing leg power and chair rise in this population and is worthy of further investigation as a means of enhancing balance and mobility.

Age Factors↗

PubMed2003

The protective effect of social engagement on 1-year mortality in a long-stay nursing home population.

We examined the effect of social engagement (SE) on mortality in 30,070 long-stay nursing home residents who were > or =65 years of age and did not have a serious communication problem. Information on SE and resident characteristics were obtained from the Minimum Data Set, and death information was obtained from the National Death Index. Life table analyses show that greater levels of SE are associated with longer survival (P=.0001). Adjusted proportional hazards regression results show that for each increase in the SE scale, residents are 0.94 (range 0.92-0.95) times as likely to die during the follow-up period, independent of known factors associated with mortality. Future studies are needed to understand psychological and other factors related to residents' capacity and motivation for social engagement that could increase quality and quantity of life in nursing home residents.

Aged↗

PubMed2003

Mortality-related factors and 1-year survival in nursing home residents.

OBJECTIVES: To identify factors associated with 1-year mortality in newly admitted and long-stay (in nursing home longer than 1 year) nursing home residents by linking Minimum Data Set (MDS) information with data from the National Death Index and use these factors to create a useful tool for estimating risk levels for 1-year mortality. DESIGN: Retrospective cohort study with development and validation cohorts. SETTING: All 643 Medicare and Medicaid certified nursing homes in New York State during the study period. PARTICIPANTS: The study included data on residents collected during full MDS assessments from June 1994 through December 1997. A total of 100,669 nursing home residents met the inclusion criteria for the newly admitted resident analysis. The newly admitted development cohort included 60,341 residents, and the newly admitted validation cohort included 40,328 residents. A total of 36,125 nursing home residents met inclusion criteria for the long-stay (residing in nursing home>1 year) cohort. The long-stay development cohort included 22,749 residents, and the long-stay validation cohort included 15,068 residents. MEASUREMENTS: The analytical approach was similar for the newly admitted and long-stay resident cohorts. Resident characteristics that were considered potential risk factors for mortality were examined individually in bivariate proportional hazards models, and factors with P <.05 were entered into a proportional hazards regression stepwise model. The strongest factors based on their chi-square values were selected for entry into a multivariate proportional hazards analysis. Hazard ratios (HRs), 95% confidence intervals, and P-values were derived from this model. A mortality risk index score was created for each resident by summing the value of each HR in the multivariate model for those who had the risk factor. A sensitivity analysis was performed to determine the effect of residents with an unknown death status. A similar analysis was performed on the validation cohort to validate the original results. RESULTS: Major factors associated with 1-year mortality were identified in both the newly admitted and long-stay cohorts. In both newly admitted and long-stay residents, a higher mortality risk index score was associated with increased 1-year mortality in both the development and validation cohorts. CONCLUSIONS: MDS data can identify major factors associated with 1-year mortality in newly admitted and long-stay nursing home residents. These factors can be used to stratify residents into risk categories for 1-year mortality. This information could be important to residents, their families, and their physicians when developing care plans, as well as to agencies interested in healthcare resource planning.

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