Constructing an Index for the Subjective Well-being Under Neuroleptics scale (SWN), short form: applying structural equation modeling for testing reliability and validity of the index.
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Constructing an Index for the Subjective Well-being Under Neuroleptics scale (SWN), short form: applying structural equation modeling for testing reliability and validity of the index. / Schmidt, Peter; Clouth, Johannes; Haggenmüller, Lars; Naber, Dieter; Reitberger, Ursula.
in: QUAL LIFE RES, Jahrgang 15, Nr. 7, 7, 2006, S. 1191-1202.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Constructing an Index for the Subjective Well-being Under Neuroleptics scale (SWN), short form: applying structural equation modeling for testing reliability and validity of the index.
AU - Schmidt, Peter
AU - Clouth, Johannes
AU - Haggenmüller, Lars
AU - Naber, Dieter
AU - Reitberger, Ursula
PY - 2006
Y1 - 2006
N2 - Structural equation modeling (SEM) has been widely used in psychology and sociology for testing validity of measurement instruments. However, this statistical technique has so far played minor role in quality-of-life research. The main objective of this paper is to demonstrate the potential of SEM for constructing and testing the validity of a Subjective Well-being under Neuroleptics (SWN) index for patients with schizophrenia. For these purposes, data from the GEO study (Gesundheitsökonomische Evaluation von Olanzapin in Deutschland; Health economics study of olanzapine in the treatment of schizophrenia in Germany) were used. The GEO is a prospective, comparative, noninterventional, observational study. A total of 646 participants treated with either olanzapine (n = 416) or haloperidol (n = 230) were enrolled in the study; 360 patients were available for factor analyses. The short (20-item) form of the SWN scale was administered to assess patients' perspectives on their quality of life. The structural equation models (SEMs) were then applied to construct 5- and 10-item indexes based on SWN. The data indicate that the 5-item index is the most time-saving approach for evaluating perceptions of well-being (and thus, quality of life) among patients with schizophrenia. The application of SEM showed no appreciable loss of validity of this index.
AB - Structural equation modeling (SEM) has been widely used in psychology and sociology for testing validity of measurement instruments. However, this statistical technique has so far played minor role in quality-of-life research. The main objective of this paper is to demonstrate the potential of SEM for constructing and testing the validity of a Subjective Well-being under Neuroleptics (SWN) index for patients with schizophrenia. For these purposes, data from the GEO study (Gesundheitsökonomische Evaluation von Olanzapin in Deutschland; Health economics study of olanzapine in the treatment of schizophrenia in Germany) were used. The GEO is a prospective, comparative, noninterventional, observational study. A total of 646 participants treated with either olanzapine (n = 416) or haloperidol (n = 230) were enrolled in the study; 360 patients were available for factor analyses. The short (20-item) form of the SWN scale was administered to assess patients' perspectives on their quality of life. The structural equation models (SEMs) were then applied to construct 5- and 10-item indexes based on SWN. The data indicate that the 5-item index is the most time-saving approach for evaluating perceptions of well-being (and thus, quality of life) among patients with schizophrenia. The application of SEM showed no appreciable loss of validity of this index.
M3 - SCORING: Zeitschriftenaufsatz
VL - 15
SP - 1191
EP - 1202
JO - QUAL LIFE RES
JF - QUAL LIFE RES
SN - 0962-9343
IS - 7
M1 - 7
ER -
