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DOI: 10.1055/s-2003-38613
Die Längsschnittanalyse der Einflussfaktoren der direkten Kosten der Schizophreniebehandlung
Longitudinal Analysis of Factors Influencing Direct Costs of Schizophrenia TreatmentPublikationsverlauf
Publikationsdatum:
16. April 2003 (online)
Zusammenfassung
Im Rahmen einer prospektiven Längsschnittstudie mit 5 Messzeitpunkten wurden die direkten Kosten der psychiatrischen Versorgung sowie klinische und soziale Merkmale von 307 Patienten mit schizophrenen Erkrankungen (ICD-10 F 20.0) über einen Zeitraum von 2,5 Jahren erfasst. Zur Längsschnittanalyse der Einflussfaktoren der Kostenvarianz wurde ein Random-Effect-Regressionsmodell berechnet. Eine Differenzierung von Längs- und Querschnitteffekten der unabhängigen Variablen erfolgte mittels Gegenüberstellung eines Within-Effect- und eines Between-Effect-Regressionsmodells. Die Ergebnisse der Studie zeigen, dass 10 % der Within-Varianz und 32 % der Between-Varianz der direkten psychiatrischen Versorgungskosten durch das Random-Effect-Modell erklärt werden. Signifikante Längsschnitteffekte werden für das Eintreten eines psychotischen Rückfalls und für die Veränderung des Funktionsniveaus festgestellt. Querschnitteffekte zeigen sich für die Lebenssituation, die Partnerschaft, die Zahl stationärer Voraufenthalte, die Symptomatik, Depression, Alkoholmissbrauch und die Zahl kritischer Lebensereignisse. Die Ergebnisse zeigen, dass Interventionen zur Kosteneinsparung nicht nur auf der medizinischen, sondern auch auf der psychosozialen Ebene angesiedelt sein müssen. Das Verhältnis der erklärten Within- und Between-Varianzanteile macht gleichzeitig deutlich, dass die Möglichkeiten einer Beeinflussung der Versorgungskosten durch patientenbezogene Interventionen begrenzt sind.
Abstract
In a prospective longitudinal study with 5 points of measurement the direct service costs as well as the clinical and social characteristics of 307 outpatients with the diagnosis of schizophrenia (ICD 10 F 20.0) were assessed over a period of 2.5 years. A random-effect regression model was computed for the assessment of the impact of clinical and social variables on cost variance. Within-effect and between-effect of independent variables on the cost variance were identified by comparing of within and between effect models. Results of the study show that 10 % of the within variance and 32 % of the between variance were explained by the random effect model. Significant within effects were found for a deterioration of emotional health status and for general level of functioning. Significant between effects were found for living situation, partnership, number of inpatient episodes, psychopathological symptoms, depression, alcohol abuse and number of life events. The study results suggest that interventions aiming at the reduction of direct costs should not be restricted to medical treatment but must also include psychosocial interventions for the enhancement of general functioning. However, the explained proportions of within and between variance reveal that the possibilities of manipulating direct treatment costs by means of patient-related interventions may be limited.
Schlüsselwörter
Gesundheitsökonomie - Schizophreniebehandlung - direkte Kosten - Längsschnittanalyse - Random-Effekt-Regression
Key words
Health economy - schizophrenia treatment - direct costs - longitudinal analysis - random-effect regression
Literatur
- 1 Rössler W, Salize H J, Cucchiaro G. et al . Does the place of treatment influence the quality of life of schizophrenics?. Acta Psychiatr Scand. 1999; 100 142-148
- 2 Bonizzato P, Bisoffi G, Amaddeo F. et al . Community-based mental health care: to what extent are service costs associated with clinical, social and service history variables?. Psychol Med. 2000; 30 1205-1215
- 3 Byford S, Barber J A, Fiander M. et al . Factors that influence the costs of caring for patients with severe psychotic illness. Br J Psychiatry. 2001; 178 441-447
- 4 Crown W h, Neslusan C, Russo P A. et al . Hospitalization and total medical costs for privately insured persons with schizophrenia. Admin Policy Ment Health. 2001; 28 335-351
- 5 Dickey B, Fisher W, Siegel C. et al . The cost and outcomees of community-based care for the seriously mentally ill. Health Serv Res. 1997; 32 (5) 599-614
- 6 Garattini L, Rossi C, Tediosi F. et al . Direct costs of schizophrenia in italian community psychiatric services. Pharmacoeconomics. 2001; 19 1217-1225
- 7 Haro J M, Salvador-Carulla L, Cabases J. et al. and the PSICOST Group . Utilisation of mental health services and costs of patients with schizophrenia in three areas of spain. Br J Psychiatry. 1998; 173 334-340
- 8 Knapp M, Chisholm D, Leese M. et al . Comparing Pattern and costs of schizophrenia care in five european countries: The EPSILON study. Acta Psychiatr Scand. 2002; 105 42-54
- 9 McCrone P, Johnson S, Thornicroft G. Predicting the costs of community care for individuals with severe mental illness in South London. Schizophr Bull. 2001; 27 653-660
- 10 Tarricone R, Gerzeli S, Montanelli R. et al . Direct and indirect costs of schizophrenia in community psychiatric services in Italy. The GISIES study. Health Pol. 2000; 51 1-18
- 11 Domino M E, Salkever D S. Recent economic research on service utilization and costs: schizophrenia and substance abuse. Curr Opin Psychiatry. 2000; 13 227-230
- 12 Pijl Y J, Sytema S, Barels R. et al . Costs of deinstitutionalization in a rural catchment area in the Netherlands. Psychol Med. 2002; 32 1435-1443
- 13 Laugharne R, Byford S, Barber J A. et al . The effect of alcohol consumption on cost of care in severe psychotic illness: a report from the UK700 study. Acta Psychiatr Scand. 2002; 1 241-246
- 14 Rothbard A B, Kuno E, Schinnar A P. et al . Service utilization and cost of community care for discharged state hospital patients: a 3-year follow-up study. Am J Psychiatr. 1999; 156 920-927
- 15 Baltagi B H. Econometric analysis of panel data. Chicester, New York; John Wiley & Sons 2001
- 16 Gibbons R D, Hedeker D, Elkin I. et al . Some conceptual and statistical issues in analysis of longitudinal psychiatric data. Application to the NIMH treatment of depression collaborative research program dataset. Arch Gen Psychiatr. 1993; 50 739-750
- 17 Kilian R, Matschinger H, Löffler W. et al . A comparison of methods to handle skew distributed cost variables in the analysis of the resource consumption in schizophrenia treatment. J Ment Health Pol Econ. 2002; 5 21-31
- 18 Diehr P, Yanez D, Ash A. et al . Methods for analyzing health care utilization and costs. Am Rev Public Health. 1999; 20 125-144
- 19 Kilian R, Matschinger H, Löffler W. et al . Regressionsanalytische Kostenfunktionen in der psychiatrischen Versorgungsforschung: Ein Methodenvergleich am Beispiel der Kosten der Schizophreniebehandlung. Gesundh ökon Qual manag. 2002; 7 36-42
- 20 Baltagi B H, Wu P X. Unequal spaced panel data regressions with AR(1) disturbances. Econometric Theory. 1999; 15 814-823
- 21 Kilian R, Roick C, Matschinger H. et al . The analysis of cost structures of the treatment of schizophrenia by means of standardized assessment instruments. Psychiatr Prax. 2001; 28 (Sonderheft 2) S102-S108
- 22 Corporation Stata .Stata Reference Manual. Release 7 College Station; Stata Press 2001
- 23 Baltagi B H, Wu P X. Unequally spaced panel data regressions with AR(1) disturbances. Econometric Theory. 1999; 15 814-823
- 24 Efron B, Tibshirani R. Bootstrap Methods for standard errors, confidence intervals, and other Measures of statistical accuracy. Statistical Sciences. 1986; 1 54-77
Dr. Reinhold Kilian
Universität Leipzig, Klinik und Poliklinik für Psychiatrie
Johannissallee 20
04317 Leipzig
eMail: kilr@medizin.uni-leipzig.de