Clara Teusen1, Alexander Hapfelmeier1,2, Victoria von Schrottenberg1, Feyza Gökce1, Gabriele Pitschel-Walz1, Peter Henningsen3, Jochen Gensichen4, Antonius Schneider1. 1. Institute of General Practice and Health Services Research, TUM School of Medicine, Technical University of Munich, Munich, Bavaria, Germany. 2. Institute for AI and Informatics in Medicine, TUM School of Medicine, Technical University of Munich, Munich, Bavaria, Germany. 3. Dept. of Psychosomatic Medicine and Psychotherapy, University Hospital TU Munich, Munich, Bavaria, Germany. 4. Institute of General Practice and Family Medicine, University Hospital of the Ludwig-Maximilians-University of Munich, Munich, Bavaria, Germany.
Abstract
BACKGROUND: Screening questionnaires are not sufficient to improve diagnostic quality of depression in primary care. The additional consideration of the general practitioner's (GP's) assessment could improve the accuracy of depression diagnosis. The aim of this study was to examine whether the GP rating supports a reliable depression diagnosis indicated by the PHQ-9 over a period of three months. METHODS: We performed a secondary data analysis from a previous study. PHQ-9 scores of primary care patients were collected at the time of recruitment (t1) and during a follow-up 3 months later (t2). At t1 GPs independently made a subjective assessment whether they considered the patient depressive (yes/no). Two corresponding groups with concordant and discordant PHQ-9 and GP ratings at t1 were defined. Reliability of the PHQ-9 results at t1 and t2 was assessed within these groups and within the entire sample by Cohen's Kappa, Pearson's correlation coefficient and Bland-Altman plots. RESULTS: 364 consecutive patients from 12 practices in the region of Upper Bavaria/Germany participated in this longitudinal study. 279 patients (76.6%) sent back the questionnaire at t2. Concordance of GP rating and PHQ-9 at t1 led to higher replicability of PHQ-9 results between t1 and t2. The reliability of PHQ-9 was higher in the concordant subgroup (κ = 0.507) compared to the discordant subgroup (κ = 0.211) (p = 0.064). The Bland-Altman Plot showed that the deviation of PHQ-9 scores at t1 and t2 decreased by about 15% in the concordant subgroup. Pearson's correlation coefficient between PHQ-9 scores at t1 and t2 increased significantly if the GP rating was concordant with the PHQ-9 at t1 (r = 0.671) compared to the discordant subgroup (r = 0.462) (p = 0.044). CONCLUSIONS: The combination of PHQ-9 and GP rating might improve diagnostic decision making regarding depression in general practices. PHQ-9 positive results might be more reliable and accurate, when a concordant GP rating is considered.
BACKGROUND: Screening questionnaires are not sufficient to improve diagnostic quality of depression in primary care. The additional consideration of the general practitioner's (GP's) assessment could improve the accuracy of depression diagnosis. The aim of this study was to examine whether the GP rating supports a reliable depression diagnosis indicated by the PHQ-9 over a period of three months. METHODS: We performed a secondary data analysis from a previous study. PHQ-9 scores of primary care patients were collected at the time of recruitment (t1) and during a follow-up 3 months later (t2). At t1 GPs independently made a subjective assessment whether they considered the patient depressive (yes/no). Two corresponding groups with concordant and discordant PHQ-9 and GP ratings at t1 were defined. Reliability of the PHQ-9 results at t1 and t2 was assessed within these groups and within the entire sample by Cohen's Kappa, Pearson's correlation coefficient and Bland-Altman plots. RESULTS: 364 consecutive patients from 12 practices in the region of Upper Bavaria/Germany participated in this longitudinal study. 279 patients (76.6%) sent back the questionnaire at t2. Concordance of GP rating and PHQ-9 at t1 led to higher replicability of PHQ-9 results between t1 and t2. The reliability of PHQ-9 was higher in the concordant subgroup (κ = 0.507) compared to the discordant subgroup (κ = 0.211) (p = 0.064). The Bland-Altman Plot showed that the deviation of PHQ-9 scores at t1 and t2 decreased by about 15% in the concordant subgroup. Pearson's correlation coefficient between PHQ-9 scores at t1 and t2 increased significantly if the GP rating was concordant with the PHQ-9 at t1 (r = 0.671) compared to the discordant subgroup (r = 0.462) (p = 0.044). CONCLUSIONS: The combination of PHQ-9 and GP rating might improve diagnostic decision making regarding depression in general practices. PHQ-9 positive results might be more reliable and accurate, when a concordant GP rating is considered.
Authors: Antonius Schneider; Eva Wartner; Isabelle Schumann; Elisabeth Hörlein; Peter Henningsen; Klaus Linde Journal: J Psychosom Res Date: 2012-10-02 Impact factor: 3.006
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Authors: Frank Jacobi; Michael Höfler; Jens Siegert; Simon Mack; Anja Gerschler; Lucie Scholl; Markus A Busch; Ulfert Hapke; Ulrike Maske; Ingeburg Seiffert; Wolfgang Gaebel; Wolfgang Maier; Michael Wagner; Jürgen Zielasek; Hans-Ulrich Wittchen Journal: Int J Methods Psychiatr Res Date: 2014-04-11 Impact factor: 4.035