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Biomedical subjects

Susan M Paddock

Publications and source records attributed to Susan M Paddock.

10 recordsLinked to original sources
PubMed2007

Did the Medicare inpatient rehabilitation facility prospective payment system result in changes in relative patient severity and relative resource use?

BACKGROUND: The Centers for Medicare and Medicaid Services implemented a prospective payment system (PPS) in 2002 for care provided by inpatient rehabilitation facilities (IRFs) to Medicare beneficiaries. OBJECTIVE: We sought to examine changes in the composition of Medicare beneficiaries in IRFs by examining the percentages of patients having worse functional or health status than the average for their payment groups (relative severity) and of patients having greater cost or longer length of stay than the average for their payment groups (relative resource use) before versus after IRF PPS; to examine whether observed changes in relative resource use were expected given predicted changes; and to explore whether these effects varied by IRF Medicare volume. METHODS: In an observational study of indicators of Medicare beneficiary relative severity and relative resource use, we studied cases paid for by Medicare during 1999 and 2002 having an acute care stay preceding their IRF stay (n = 363,542 in 1999 and 446,002 in 2002). RESULTS: Similar percentages of cases had longer than expected lengths of stay, greater-than-expected costs per case, and worse-than-expected functional status pre- versus post-IRF PPS. Cases under the IRF PPS had lower predicted probabilities of death 150 days after admission. Although predicted relative resource use remained steady, observed relative resource use decreased after IRF PPS. CONCLUSIONS: IRF patient composition has not changed meaningfully for Medicare beneficiaries, but patients within payment groups are being provided less care, which could be attributable to the IRF PPS, existing trends in decreasing length of stay, or both.

Aged↗
PubMed2006

Improving care for depression in patients with comorbid substance misuse.

OBJECTIVE: The authors investigated whether quality improvement programs for depression would be effective among substance misusers and whether there would be a differential program-by-comorbidity effect. METHOD: A group-level randomized controlled trial (Partners in Care) compared two quality improvement programs for depression with usual care. Consecutive patients (N=27,332) from six managed care organizations in five states were screened, and 1,356 were enrolled: 443 received usual care while the rest entered a quality improvement program involving either medication (N=424) or therapy (N=489). Multiple logistic regression was used to test hypotheses and compute standardized predictions of the adjusted rates of depression and use of psychotherapy and antidepressants. RESULTS: Under usual care conditions, depressed patients with substance misuse had an increased probability of ongoing depression despite higher rates of overall appropriate treatment. Among clients with comorbid substance misuse, the quality improvement programs were associated with improved depression outcomes at 12 months and increased antidepressant use at 6 months. Among clients with no substance misuse, the quality improvement programs improved depression outcomes at 6 months and were associated with increased treatment utilization. CONCLUSIONS: Co-occurring substance misuse is associated with depression and with increased risk for poorer depression treatment outcomes under usual care conditions. Quality improvement programs can significantly reduce the likelihood of probable depressive disorders in depressed patients with and without comorbid substance misuse. No consistent evidence was found for a differential program-by-comorbidity effect except for a suggestion of greater increase in psychotherapy among individuals with no substance misuse.

Adult↗
PubMed2005

Identification of and guidance for problem drinking by general medical providers: results from a national survey.

BACKGROUND: Heavy alcohol use is associated with health costs and medical problems. There has been a growing consensus that primary care patients should be screened for alcohol problems. OBJECTIVES: We examined rates at which patients were asked about alcohol or drug use and problems, extending research in this area by using a standardized problem drinking instrument with a large national sample, examining community level variables, and assessing the extent to which patients who were identified received follow-up. SUBJECTS: A subsample of 7371 persons from the 1998 Healthcare for Communities survey who reported visiting a general medical provider (GMP) in the past year. MEASURES: Participants completed questionnaires on demographics, mental and physical health, alcohol, drug use and problems, enrollment in a managed health care plan, whether their medical provider asked about alcohol or drug use, and whether they received advice, counseling, or referral. RESULTS: Being asked about alcohol and drug use was associated with being male, young, highly educated, more health problems, mental health diagnosis, and being classified as a problem drinker. Only 48% of problem drinkers received any follow-up, with most being told to "stop drinking" by their GMP. CONCLUSIONS: Few people are queried about alcohol or drug use when they visit a GMP. When problem use is identified, most patients do not receive appropriate follow-up and aftercare. The quality of primary care could improve if GMPs were educated about providing brief advice/counseling and were given information concerning resources in their community to make appropriate referrals for patients.

Adolescent↗
PubMed2004

Abuse in the close relationships of people with HIV.

We estimated the proportion of adults receiving HIV care who are involved in abusive close relationships and identified factors associated with abuse perpetration and victimization. A nationally representative sample of 1,421 persons in care for HIV included 51% who reported having a close relationship (a spouse or a primary relationship partner) during a 6-month period. Of those in a close relationship, 26.8%reported the presence of abuse. Forty-eight percent of all abuse was mutual, and abuse perpetration and victimization occurred equally often. Age, substance abuse, and psychiatric disorder, as well as characteristics of relationships (e.g., both partners seropositive) predicted perpetration and/or victimization. After adjusting for these factors, females were not found to differ from gay men in their likelihood of being perpetrators of abuse or victims. However, African Americans were more likely than Whites to be involved in an abusive relationship. Interventions for people with HIV must address the presence of abuse in close relationships, regardless of gender or sexual orientation, but may benefit from targeting people of color.

Adolescent↗
PubMed2004

Prevalence and characteristics of clients with co-occurring disorders in outpatient substance abuse treatment.

This article reports on the prevalence of probable mental health disorders among clients entering outpatient substance abuse treatment, their clinical characteristics, and past access to substance abuse and mental health care. Four hundred fifteen individuals (74% of those eligible) entering three publicly funded outpatient substance abuse treatment facilities in Los Angeles County were screened for a probable mental health disorder. Of the 210 with a positive screener (just over 50% of those screened), 195 (93%) were interviewed. Depression and anxiety were the most common disorders, and more than a third had two or more probable disorders. Close to 70% reported using alcohol, and almost half reported using crack or cocaine. Half had never received any mental health treatment, and for a third this was their first episode of addiction treatment; 22% were on psychotropic medications. Levels of physical and mental health functioning were lower than the 25th percentile of the U.S. population norms. Our results indicate high rates of co-occurring mental health disorders among individuals entering these outpatient substance abuse treatment clinics in Los Angeles. Identifying people with probable mental health disorders as they enter treatment has the potential to increase access to care among those with limited prior access.

Adult↗
PubMed2004

Evaluating the planned substitution of the minimum data set-post acute care for use in the rehabilitation hospital prospective payment system.

OBJECTIVE: The objective of this study was to evaluate the payment implications of substituting the Minimum Data Set-Post Acute Care (MDS-PAC) for the FIM trade mark instrument for use in the planned prospective payment system (PPS) for inpatient rehabilitation hospitals. FIM trade mark is a trademark of the Uniform Data System for Medical Rehabilitation, a division of UB Foundation Activites, Inc. RESEARCH DESIGN: We used a prospective cross-sectional design using consecutive sampling. SUBJECTS: We studied all Medicare admissions with stays of 3 days or more over a 2-month period to 50 inpatient rehabilitation hospitals in 22 states. MEASUREMENTS AND METHODS: Each participating institution completed both the FIM and the MDS-PAC assessments on all participants. Items from the MDS-PAC were combined and translated to create "FIM-like" items. We assessed agreement of classification into prospective payment cells using FIM assessment data and also using MDS-PAC data. Statistical adjustments were applied to improve the level of agreement. RESULTS: The mean differences between the FIM motor and cognitive scales and their MDS-PAC translations were 2.4 (mean = 45) and 0.0 (mean = 28), respectively, with scale correlations of.85 and.84. Weighted kappas on individual items ranged from.32 to.64. There were substantial hospital-specific differences in scoring. Payment cell classification using FIM data agreed with that using MDS-PAC data only 56% of the time. Twenty percent of the facilities experienced revenue shifts larger than 10%. CONCLUSION: Despite better item-level agreement than previously observed, poor payment cell agreement and substantial revenue shifts indicated that the MDS-PAC should not be substituted for the FIM trade mark instrument in the rehabilitation hospital PPS.

Cross-Sectional Studies↗
PubMed2004

Identifying and accommodating statistical outliers when setting prospective payment rates for inpatient rehabilitation facilities.

OBJECTIVE: To demonstrate how a Bayesian outlier accommodation model identifies and accommodates statistical outlier hospitals when developing facility payment adjustments for Medicare's prospective payment system for inpatient rehabilitation care. DATA SOURCES/STUDY SETTING: Administrative data on costs and facility characteristics of inpatient rehabilitation facilities (IRFs) for calendar years 1998 and 1999. STUDY DESIGN: Compare standard linear regression and the Bayesian outlier accommodation model for developing facility payment adjustors for a prospective payment system. DATA COLLECTION: Variables describing facility average cost per case and facility characteristics were derived from several administrative data sources. PRINCIPAL FINDINGS: Evidence was found of non-normality of regression errors in the data used to develop facility payment adjustments for the inpatient rehabilitation facilities prospective payment system (IRF PPS). The Bayesian outlier accommodation model is shown to be appropriate for these data, but the model is largely consistent with the standard linear regression used in the development of the IRF PPS payment adjustors. CONCLUSIONS: The Bayesian outlier accommodation model is more robust to statistical outlier IRFs than standard linear regression for developing facility payment adjustments. It also allows for easy interpretation of model parameters, making it a viable policy alternative to standard regression in setting payment rates.

Bayes Theorem↗
PubMed2003

An assessment tool translation study.

Policymakers hoped to substitute a new, multi-purpose, functional assessment instrument, the minimum data set post-acute care (MDS-PAC), into the planned prospective payment system (PPS) for inpatient rehabilitation hospitals. PPS design requires a large database linking treatment costs with measures of the need for care, so the PPS was designed using the functional independence measure (FIM) database linked to Medicare hospital claims. An accurate translation from the MDS-PAC items to FIM--like items was needed to ensure payment equity under the substitution. This article describes the translation efforts and some of the problems that led policymakers to abandon the effort.

Activities of Daily Living↗
PubMed2002

Reassessing the marijuana gateway effect.

AIMS: Strong associations between marijuana use and initiation of hard drugs are cited in support of the claim that marijuana use per se increases youths' risk of initiating hard drugs (the 'marijuana gateway' effect). This report examines whether these associations could instead be explained as the result of a common factor-drug use propensity-influencing the probability of both marijuana and other drug use. DESIGN: A model of adolescent drug use initiation in the United States is constructed using parameter estimates derived from US household surveys of drug use conducted between 1982 and 1994. Model assumptions include: (1) individuals have a non-specific random propensity to use drugs that is normally distributed in the population; (2) this propensity is correlated with the risk of having an opportunity to use drugs and with the probability of using them given an opportunity, and (3) neither use nor opportunity to use marijuana is associated with hard drug initiation after conditioning on drug use propensity. FINDINGS: Each of the phenomena used to support claims of a 'marijuana gateway effect' are reproduced by the model, even though marijuana use has no causal influence over hard drug initiation in the model. CONCLUSIONS: Marijuana gateway effects may exist. However, our results demonstrate that the phenomena used to motivate belief in such an effect are consistent with an alternative simple, plausible common-factor model. No gateway effect is required to explain them. The common-factor model has implications for evaluating marijuana control policies that differ significantly from those supported by the gateway model.

Adolescent↗