Development of a Japanese version of the Somatic Symptom Scale-8

TY - JOUR

T1 - Development of a Japanese version of the Somatic Symptom Scale-8

T2 - Psychometric validity and internal consistency

AU - Matsudaira, Ko

AU - Oka, Hiroyuki

AU - Kawaguchi, Mika

AU - Murakami, Masato

AU - Fukudo, Shin

AU - Hashizume, Makoto

AU - Löwe, Bernd

N1 - Copyright © 2016 Elsevier Inc. All rights reserved.

PY - 2017/3/10

Y1 - 2017/3/10

N2 - OBJECTIVE: We aimed to psychometrically validate the Japanese version of the Somatic Symptom Scale-8 (SSS-8) in Japanese individuals.METHOD: Data were collected from Japanese individuals aged 20-64years, who were recruited online, in February 2015. The scale reliability and validity were analyzed.RESULTS: Data from 52,353 individuals were analyzed. Cronbach's alpha for the assessment of internal consistency reliability was 0.86 for the total score. The concurrent validity results showed strong correlations with three domains of the Profile of Mood States-Brief form (ρ=0.51-0.61) and the EuroQol 5 Dimension (ρ=-0.54). The known-group validity results indicated a linear trend in the severity of depression stratified using the Patient Health Questionnaire-2 (Jonckheere-Terpstra test, p<0.001). Regarding convergent and discriminant validities, all items correlated most strongly with their own domains (coefficients≥0.5), except for one item (headaches). Scores on perceived stress, pain, and general health differed across five SSS-8 severity groups (Steel-Dwass test, p<0.001), expect for one group pair in health.CONCLUSION: The Japanese version of the SSS-8 was valid with good internal consistency. This questionnaire could help detect somatic symptom burdens of chronic and severe musculoskeletal pain for primary prevention.

AB - OBJECTIVE: We aimed to psychometrically validate the Japanese version of the Somatic Symptom Scale-8 (SSS-8) in Japanese individuals.METHOD: Data were collected from Japanese individuals aged 20-64years, who were recruited online, in February 2015. The scale reliability and validity were analyzed.RESULTS: Data from 52,353 individuals were analyzed. Cronbach's alpha for the assessment of internal consistency reliability was 0.86 for the total score. The concurrent validity results showed strong correlations with three domains of the Profile of Mood States-Brief form (ρ=0.51-0.61) and the EuroQol 5 Dimension (ρ=-0.54). The known-group validity results indicated a linear trend in the severity of depression stratified using the Patient Health Questionnaire-2 (Jonckheere-Terpstra test, p<0.001). Regarding convergent and discriminant validities, all items correlated most strongly with their own domains (coefficients≥0.5), except for one item (headaches). Scores on perceived stress, pain, and general health differed across five SSS-8 severity groups (Steel-Dwass test, p<0.001), expect for one group pair in health.CONCLUSION: The Japanese version of the SSS-8 was valid with good internal consistency. This questionnaire could help detect somatic symptom burdens of chronic and severe musculoskeletal pain for primary prevention.

KW - Adult

KW - Anxiety

KW - Depression

KW - Fatigue

KW - Female

KW - Health Status

KW - Humans

KW - Japan

KW - Male

KW - Middle Aged

KW - Pain

KW - Psychiatric Status Rating Scales

KW - Psychometrics

KW - Reproducibility of Results

KW - Severity of Illness Index

KW - Surveys and Questionnaires

KW - Young Adult

KW - Journal Article

U2 - 10.1016/j.genhosppsych.2016.12.002

DO - 10.1016/j.genhosppsych.2016.12.002

M3 - SCORING: Journal article

C2 - 28274342

VL - 45

SP - 7

EP - 11

JO - GEN HOSP PSYCHIAT

JF - GEN HOSP PSYCHIAT

SN - 0163-8343

ER -