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Hospital stay length as an effect modifier of other risk factors for nosocomial infection.

This paper addresses the problem of hospital stay length as a risk factor for nosocomial infection and as a modifier of the effect of other risk factors for hospital infection. Patients were selected form two cross-sectional studies done in two different seasons of 1986. Risk of infection rose fairly steadily as hospital stay length increased (correlation coefficient: 0.83, p less than 0.01). Several risk factors (operation, underlying disease, and age) were analyzed on the basis of 1) raw data and 2) data stratified by length of stay. The results showed that hospital stay length is a strong modifier of the remaining risk factors, generally reducing, their effect on the development of hospital infection as length of stay increases.

Adolescent

[Length of stay and length of work incapacity in patients with Type I diabetes. Effects of a diabetes treatment and education program].

Objective data on duration of hospital stay and of incapacity to work were collected for 137 type I diabetics who had taken part in a structured diabetes treatment and training scheme. Before the training period the average hospital stay had been 0.76 per patient per year, duration per stay 21 days, number of episodes of work incapacity 1.6 per patient per year, duration of incapacity 23.6 days. For a subgroup of patients (62) the influence of the training programme could be demonstrated: hospital stay fell to 0.49 per patient per year, duration per stay to 12.0 days, number of incapacity episodes to 1.4 per patient per year, and the days lost from work to 12.1 per patient per year.

Absenteeism

[Factors related to length of hospitalization of elderly patients during short stay].

Length of stay of elderly patients in hospitals can be subdivised into a medical stay followed by a social stay. The average length of stay of 2134 patients aged 75 and over, admitted to 23 medical or geriatric acute wards in Aquitaine, was 13.6 days; 18% of the patients experienced a social stay of at least one day. The mean social stay was almost null (1 day) when the patient returned home, but could reach 5 days when he was discharged to a long term care facility. The kind of hospital, domicile in a rural area, the social network, and the grounds for hospitalization were significantly related to the total length of stay, but explained only 5% of variance if diagnosis was not taken into account. This percentage rose to 29% in the group with "bronchitis" as a main diagnosis. The length of social stay was related to the grounds for hospitalization, but also to recent family modifications; it did not depend on the kind of hospital. These results suggest a lack of accessibility to nursing-homes, following acute hospitalization.

Aged

Detention in Broadmoor. Factors in length of stay.

When the length of stay of restricted patients admitted to Broadmoor under the legal category of psychopathic disorder was examined, the factor found to be of primary importance was the gravity of the admission offence. If the men's offences did not cause personal injury, they had a good chance of early release. Patients convicted of violent or sexual offences, and particularly those who attacked strangers, made up the great majority of the long-term group. For the mentally ill there was no relationship between length of stay and admission offence: instead the data suggested that severity and chronicity of illness were the main relevant factors.

Antisocial Personality Disorder

Clinical course and predictors of length of stay in hospitalized patients with rheumatoid arthritis.

Patients admitted for therapy of active rheumatoid arthritis were prospectively followed throughout their hospital stay. Average length of stay was 17.1 days. Serial global assessments, whether determined by rheumatologist, physiotherapist or patient appeared to improve linearly until at least hospital day 21. From admission to discharge, mean global assessment scores improved by about one third. Poor global assessment, high disability index, and the presence of comorbid disease and anemia on admission, as well as admission late in the week, were predictive of prolonged hospital stay.

Adult

Chronic status patients in a university hospital: bed-day utilization and length of stay.

OBJECTIVE: To examine the lengths of stay of chronic status patients in an acute care hospital, to identify discharge stages that contribute to excessive stays, to estimate the length of stay at each discharge stage and to link hospital bed-day utilization by the discharge stage to the experience of the patient. DESIGN: Two-year prospective cohort study. The number of hospital days retrospective to the date of the current admission were included in the analysis. SETTING: University hospital. PATIENTS: All 115 inpatients formally declared as achieving chronic status by July 31, 1987. OUTCOME MEASURES: Lengths of stay (total days and days at acute and chronic status) for chronic status patients, including those still in hospital at the end of the study period. Each bed-day was assigned to a discharge stage that corresponded to the patient's status. The disposition of each patient by the end of the study period was reviewed. RESULTS: The study population spent a total of 101 585 days in hospital. The total length of stay per patient was nearly four times that stated in the hospital's annual report, in which the figure was calculated only on the basis of discharge data. On average only 77.2 (8.7%) of the days were spent in acute care. The remaining days were at the chronic level: 24.1% were spent waiting for completion of an application to a long-term care facility, 25.3% for application approval and 41.9% for an available bed in the assigned long-term care institution. For 30 patients no initiation of the discharge process was ever undertaken. As the number of patients in each progressive discharge stage decreased, the wait per patient increased. By the end of the study period only 32 patients had been transferred to a public long-term care facility; 22 were still in hospital, and 35 had died waiting for placement. CONCLUSIONS: Although considered to be a useful measure of hospital efficiency, length of stay determined from discharge data creates an iceberg effect when applied to chronic status patients in acute care hospitals. Lack of access to the assigned resource is the most important reason for a delay in discharge. Interventions, whether undertaken at the patient, hospital or provincial level, must to some degree address this issue. Further study is required to determine which risk factors will predict lags at each discharge stage. Since our discharge staging reflects not only the experience of the patient but also the utilization of hospital bed-days and access to provincial resources, it provides a common language for clinicians, hospital administrators and systems planners.

Adult

The significance of selected variables in laminectomy length of stay.

Factors affecting hospital length of stay of patients undergoing laminectomy were examined by replicating a study by Sutcliffe and Vincent. Results were similar, indicating that hospital stays were longer for patients unemployed prior to admission and for those who lived alone, had previous medical diagnoses, and had a Jackson Pratt drain. Amount of postoperative ambulation also affected length of stay. There were several limitations to the study, including failure to differentiate regarding the extent of the surgical procedure. The results support the need for early discharge planning and underscore the importance of the nurse in identifying patients who are prone to longer lengths of stay.

Adult

Noise and hospital stay.

Length of hospital stay for simple cataract surgery was compared retrospectively for a period of construction noise and for two similar periods without construction noise. Hospital stay was significantly longer during the period of construction.

Aged

Predictors of hospital length of stay after heart transplantation.

Factors that predict hospital length of stay after heart transplantation were identified from retrospective data of 65 patients (82% male, mean age, 43.3 years). Multiple regression analysis with a stepwise procedure was used to generate three predictive models for length of stay: (1) a model to be used before operation, (2) a model that combines preoperative and donor information, and (3) a model that takes preoperative, donor, and postoperative factors (complete model) into consideration. Hospital length of stay ranged from 15 to 45 days after heart transplantation (median length of stay, 22.5 days; mean length of stay, 24.4 +/- 6.4 days). In the preoperative model, diagnosis, duration of cardiac symptoms, severity of heart failure, and pulmonary vascular resistance were significantly related to length of stay and together accounted for 36% of the variance in length of stay. When donor information (for example, size and ischemic time) was added to preoperative information, the resultant model failed to account for appreciably more of the variance in length of stay. A model that considered preoperative, donor, and postoperative factors accounted for 71% of the variance in length of stay. Significant variables in the model were the month in which the patient had transplantation in the program, duration of cardiac symptoms before transplantation, preoperative severity of heart failure, pulmonary vascular resistance, and postoperative incidence of severe acute rejection. Patient age, sex, and postoperative infections were not related to length of stay. In conclusion, there are cardiopulmonary and immunologic factors that can predict length of stay. The model also suggests that a program's experience with heart transplantation affects length of stay.

Adolescent

Length of stay, short stay units and psychiatric emergency admissions.

Length of stay information was collected from 1,364 individuals over a one year period for five general hospitals in a major metropolitan area. The current set of data represents homogeneity in the nature of admissions and the type of facilities examined. Three of the hospitals operated short stay units. Significant differences in the total length of stay were observed according to age, sex and presence of psychosis but there were no unequivocal distinctions between short stay and conventional hospitals.

Adult

[The influence of the clinical course and diagnosis on the length of surgical stays].

The length of stay (LOS) is one of the major determinants of rising costs in surgical patient care. We studied the timing of the diagnostic procedures performed in 323 surgical patients admitted to 8 surgical departments of a large hospital. Of these: 50 underwent gastrectomy, 28 colectomy, 90 biliary tract (BT) operation, 94 appendectomy and 61 saphenectomy. The average total and preoperative LOS were respectively 27 and 11 days in the gastrectomy group, 26 and 10 in the colectomy group, 10 and 4 in the appendectomy group, 20 and 11 in the BT group, 12 and 6 in the saphenectomy group. The LOS was not affected by the presence of a benign or malignant lesion in gastrectomy and colectomy. In the appendectomy and BT groups, patients admitted from the emergency room had a significantly lower total LOS when compared to elective admissions (8 vs 12 and 9 vs 21 days respectively, p < 0.01). The multiple regression model showed that global and preoperative LOS were influenced by the number of instrumental exams (contrastographic, endoscopic, echographic).

Adolescent

Firm, patient, and process variables associated with length of stay in four diseases.

Factors associated with length of stay in three London teaching hospitals during 1972 and 1975 were examined in patients treated for myocardial infarction, cerebrovascular disease, inguinal hernia without obstruction, and gall stones. Statistical analyses were carried out with multiple regressions on log lengths of stay.Increased length of stay was associated with infection in all four groups and with the seriousness of operative procedures in all but patients with cerebrovascular disease. Although age was a significant variable in patients with hernias and gall stones, it had relatively little practical effect on length of stay. Other significant variables in at least one disease were obesity, number of abnormalities in blood chemistry, administration of parenteral fluids or oxygen, or use of monitoring devices, and whether chest radiography was carried out, blood electrolytes and urea were measured, or anticoagulants were used. Patients with cerebrovascular disease who were not discharged to their own homes stayed on average more than two and a half times longer than other patients.Between a third and a half of the variance was explained by these variables and the variation among firms. The method described is reproducible in other hospital settings, and the study shows that much new information could be available routinely without mounting expensive field trials.

Age Factors

Length of stay for common surgical procedures: variation among districts.

Lengths of stay for appendicectomy, inguinal hernia repair and cholecystectomy for the 16 districts in the Northern Regional Health Authority (NRHA) and 15 districts in the South East Thames Regional Health Authority (SETRHA) are examined using data recorded in the Hospital Activity Analysis. Considerable variations exist among districts, with the three longest stay districts for each procedure in NRHA having an age-adjusted length of stay of 113 per cent of the regional average for appendicectomy, 125 per cent for hernia and 115 per cent for cholecystectomy. This resulted in greater than 2000 additional bed days per year being occupied in the three longest stay districts in the NRHA compared with the regional average. The age adjusted length of stay for the three shortest stay districts for each procedure is 83 per cent of the regional average for appendicectomy, 75 per cent for hernia and 85 per cent for cholecystectomy. Similar differences are seen in the SETRHA, and derive from differences in the length of both preoperative and postoperative stay. Explanations for the observed variations are considered in terms of population, organizational and clinical variables.

Adolescent

Effects of intensity of treatment and length of stay on rehabilitation outcomes.

The combined effects of intensity of treatment and length of stay during inpatient rehabilitation hospitalization on the outcomes of 95 traumatic brain injury patients were examined. Outcome was assessed using the Rancho Scale and three measures of functional status--physical performance, higher-level cognitive skills, and cognitively mediated physical skills. The effects of intensity of treatment and length of stay were assessed using 2 x 2 analyses of variance with repeated measures. The results showed clearly that both length of stay and intensity of treatment affect outcomes. Patients in the long length of stay group consistently made more progress across all outcome variables than patients in the short length of stay group. However, the greater progress of the long length of stay patients was from a point significantly more disabled than that of the short length of stay patients, with improvement at discharge to the point at which the groups were now equal. The effect of intensity of treatment was significant or closely approached significance for higher-level cognitive skills and Rancho Level. In the long length of stay group, the two intensity groups were initially equivalent, but at discharge the high-intensity group surpassed the low-intensity group. The practical implications of the results are discussed.

Adult

[Trends in length of stay of psychiatric inpatients based on "patient survey"].

The average length of occupancy for psychiatric beds in Japan has been pointed out to be among the longest in the world. However, neither the average length of occupancy since admission of psychiatric resident patients present at a facility at a given point of time (e.g. at the end of every October) nor the average length of stay of psychiatric patients until discharge have been reported in national health statistics. Using data from the "Patient Survey (1974-1984, 1987)" by the Ministry of Health and Welfare, estimates of trends for 1) length of hospitalization since admission of resident patients at the end of every October and 2) length of hospital stay from admission to discharge in patient cohorts admitted each year from 1974 to 1984, were determined. A remarkable difference in distribution was observed in the length of hospitalization in psychiatric residents and length of stay until discharge. For psychiatric residents surveyed at the end of October 1987, 13% had been resident for less than 3 months, 27% within one year, and 54% within 5 years. On the other hand, 33% of the patient cohort admitted in 1984 were discharged within one month, 59% within 3 months, and 85% within one year. Six percent of the cohort, however, had remained hospitalized for more than 3 years, some of whom were potential 'new' long-stay patients. The proportion of patients staying more than ten years shows an increase from 17% in 1974 to 30% in 1987, with the distribution of length of hospitalization in residents demonstrating a definite shift to increased length. On the other hand, length of stay until discharge shows a slight shortening.

Hospitals, Psychiatric

Impact of physical therapy weekend coverage on length of stay in an acute care community hospital.

This study compares the length of hospital stay of a group of patients treated in a community hospital during a period of five-day-a-week physical therapy coverage with the length of stay of a similar patient group treated during a period of seven-day-a-week physical therapy coverage. Comparisons of length of stay were made between the two groups and between subgroups based on diagnosis (stroke or orthopedic disorder) and surgical versus nonsurgical status. Multiple regression analysis was used to control for other factors influencing length of hospital stay. The mean length of stay was shorter for the seven-day-a-week group, and in a few subgroups the difference in length of stay was statistically significant. The results of this study suggest that weekend physical therapy may help reduce length of hospital stay. This finding should interest individuals concerned with the cost-effective use of physical therapy, especially under hospital reimbursement systems such as the Medicare diagnosis-related group.

Adolescent

Determinants of hospital cost and length of stay for patients undergoing electrophysiologic testing.

To assess the effects of various clinical factors in determining the cost and length of stay in patients undergoing electrophysiologic testing for cardiac arrhythmias, the hospital cost and length of stay data were reviewed in 222 consecutive inpatients who underwent electrophysiologic testing from January 1 to December 31, 1984. Admissions were classified as: primarily for treatment of arrhythmias (171 patients); primarily for treatment of arrhythmias but with serious concurrent illnesses that prolonged hospitalization (43 patients); or primarily for nonarrhythmic problems with electrophysiologic study an incidental part of hospitalization (8 patients). Based on allowable length of stay for the applicable DRGs, actual hospitalizations exceeded Medicare allowable length of stay by 50 to 500%. Retrospective review of hospital charts indicated that 3 clinical factors serve as effective markers in determining length of stay: need for amiodarone, induction of sustained ventricular tachycardia (VT) or ventricular fibrillation (VF), and presence of serious other medical problems that require stabilization before electrophysiologic testing. Our data indicate that 3 classes of patients can be identified: I. DRG A (45%)--those who did not have sustained VT or VF induced, did not require amiodarone and had no serious concurrent illnesses. The mean length of stay was 7.1 days. II. DRG B patients (21%)--those who had sustained VT or VF induced, but did not require amiodarone and had no serious concurrent illnesses. The mean length of stay was 13.7 days. III. DRG C patients (34%)--those who either had a serious concurrent illness or required amiodarone. The mean length of stay was 19.7 days. This classification schema might allow a more appropriate system for determining reimbursement.

Amiodarone