Prediction of major depression in Japanese adults: somatic manifestation of depression in annual health examinations.
BACKGROUND
The present study examined whether somatic symptoms found in annual health examinations, could be predictive of major depression in the ensuing year.


METHODS
Subjects analyzed were 1027 non-major-depressive workers (706 men, mean age 35) attending annual health examinations at a research institute. All were Japanese and found not to be suffering from major depression when interviewed, according to the semi-structured interviews of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV). A self-administered questionnaire containing items relating to twelve major somatic symptoms was completed by all the subjects. The same DSM-IV interviews for the diagnosis of major depression were conducted to calculate the odds ratio of baseline variables for depressive and somatic symptoms, physical examination items, and health-related life-styles for the prediction of major depression in the ensuing year.


RESULTS
The prevalence of major depression in the ensuing year was 2.5%. For four somatic symptoms (fatigue, lower back pain, dizziness, and nausea), the prevalence was higher (all p < 0.05) in those who complained of each somatic symptom at baseline than in those who did not. Furthermore, the multiple logistic regression analysis indicated that lower back pain and dizziness at baseline were independent risk factors of major depression in the ensuing year [odds ratio (95% confidence intervals), 3.2 (1.1, 8.9) and 6.0 (1.8, 20.1), respectively].


CONCLUSIONS
It is possible that somatic manifestations of depression are culturally bound phenomena and results might be generalizable only to Japanese workers.


CONCLUSIONS
Somatic symptoms reported at annual health examinations may be useful indicators for predicting major depression.
Nakao
Mutsuhiro
M
Department of Hygiene and Public Health, School of Medicine, Teikyo University, 2-11-1 Kaga, Itabashi, Tokyo 173-8605, Japan. mnakao@med.teikyo-u.ac.jp
Yano
Eiji
E
D000328:Adult; D044466:Asian People / Q000706:statistics & numerical data*; D003865:Major Depressive Disorder / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology*; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006296:Health Services / Q000706:statistics & numerical data*; D006304:Health Status; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D009790:Occupations / Q000706:statistics & numerical data; D013001:Somatoform Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology*