Development and Validation of Self Rating Questionnaire-Depression II 31 and SRQ-D II 15 : First Report

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  • Kuraoka Madoka
    Department of Psychosomatic Medicine, Toho University Medical Center Omori Hospital
  • Sato Asako
    Mejirodai clinic
  • Okuhira Yuko
    Department of Psychosomatic Medicine, Toho University Medical Center Omori Hospital
  • Suga Shigehiro
    Department of Psychosomatic Medicine, Tsurumi Sasaki hospital
  • Suzuki Satoko
    Mental Health Center, Toho University Medical Center Sakura Hospital
  • Hisamatsu Yuka
    Department of Psychosomatic Medicine, Toho University Medical Center Omori Hospital
  • Yamada Ui
    Department of Psychosomatic Medicine, Toho University Medical Center Omori Hospital
  • Hashizume Masahiro
    Department of Psychosomatic Medicine, Toho University Medical Center Omori Hospital
  • Tsuboi Koji
    Department of Psychosomatic Medicine, Toho University Medical Center Omori Hospital

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Other Title
  • SRQ-D II 31とSRQ-D II 15の信頼性・妥当性の検討 : 第1報
  • SRQ-D 2 31とSRQ-D 2 15の信頼性・妥当性の検討(第1報)
  • SRQ D 2 31 ト SRQ D 2 15 ノ シンライセイ ダトウセイ ノ ケントウ ダイ 1ポウ

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Abstract

A purpose of this study is to develop and validate two questionnaires ; Self rating questionnaire for depression (SRQ-D) II 31 and SRQ-D II 15 revised SRQ-D. The SRQ-D II 31 was made for the assessment of depressive state, and the SRQ-D15 was made for screening of major depression. 34 outpatients with major depression and 129 students completed the SRQ-D II 31 and the SDS. Exploratory factor analysis revealed that the SRQ-D II 31 included 31-items loading on one factor, which was named "symptoms of depressive state". Internal consistency of these scale were sufficiently high (SRQ-D31 : α = 0.93). 15 items out of those which had highly factor loading in SRQ-D II 31 were extracted and we made SRQ-D II 15. We examined whether or not SRQ-D II 15 can be used for a screening test. Exploratory factor analysis revealed that the SRQ-D II 15 included 15-items loading on one factor, which was named "symptoms of depressive state". Internal consistency of this scale was sufficiently high (α =0.94). A correlation coefficient between SRQ-D II 15 and SDS was strong. SRQ-D II 15's cutoff point was set at 34/35. (sensitivity : 0.857, speficitivity : 0.853) SRQ-D II 31 and SRQ-D II 15 are questionnaires which have both reliability and propriety together. We can use SRQ-D II 15 as a screening test for depressive episodes. We will make a further report after conducting more investigation.

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