Somatic symptoms for predicting depression: One-year follow-up study in annual health examinations

It has recently been noted that screening for depression can improve clinical outcomes. The purpose of the present study was to examine whether somatic symptoms reported at health examinations predicted depression in the following year. Subjects were 1066 Japanese workers (732 men, mean age 35 years) attending annual health examinations at an institute in two successive years. A self-administered questionnaire including items of 12 major somatic symptoms was given to all the subjects. Then clinical interviews of the DSM-IV were used to diagnose major depression and minor depression in both years. In addition, the 17-item Hamilton Depression Scale (HDS-17) was measured as one of the outcomes of depression in the following year. The prevalence of major (minor) depression was 3.7 (7.8)% at baseline and 3.4 (5.9)% for the following year, respectively. The following year's HDS-17 scores were higher (all P < 0.05) in those who had complained of each somatic symptom at baseline than in those who had not. Three somatic symptoms (low back pain, dizziness, and abdominal pain) at baseline were significant risk factors of major depression for the following year. Dizziness at baseline significantly predicted major and minor depression for the following year as well. Somatic symptoms may be good predictors to screen for depression at health examination.