A large literature argues for the Chinese--whether in mainland China or elsewhere--being highly likely to express depression somatically, leading to predictable detection and diagnostic difficulties. If true, detection might be assisted if a set of somatic proxies of depression were identified, and this was the principal initial objective in mounting this study.
Background Somatisation disorder (SD) has been reported as common in all ethnic groups, but the estimates of its prevalence have varied and the evidence for its associated factors has been inconsistent.
Purpose This study seeks to determine the prevalence of SD and its associated factors in multiethnic primary care clinic attenders.
Methods This cross-sectional study was on clinic attenders aged 18 years and above at three urban primary care clinics in Malaysia. The operational definition of SD was based on ICD-10 criteria for SD for research, frequent attendance, and excluded moderate to severe anxiety and depression. The instruments used were the ICD-10 symptom list, the Hospital Anxiety and Depression Scale, a semi-structured questionnaire, and SF-36.
Results We recruited 1,763 patients (response rate 63.8%). The mean age of respondents was 44.7±15.8 years, 807 (45.8%) were male; there were 35.3% Malay, 30.1% Chinese and 34.6% Indian. SD prevalence was 3.7%; the prevalence in Malay was 5.8%, Indian 3.0% and Chinese 2.1%. Significant associations were found between SD prevalence and ethnicity, family history of alcoholism, blue-collar workers and the physical component summary (PCS) score of SF-36. Multivariate analysis showed that SD predictors were Malay ethnicity (OR 2.7, 95% CI 1.6, 4.6), blue-collar worker (OR 2.0, 95% CI 1.2, 3.5) and impaired PCS score of SF-36 (OR 0.92, 95% CI 0.90, 0.95).
Conclusion The prevalence of SD was relatively uncommon with the stringent operational criteria used. SD preponderance in blue-collar workers may be attributable to secondary gain from getting sickness certificates and being paid for time off work.
Keywords Somatisation disorder . Associated factors . Primary care . Ethnic groups . Prevalence Questionnaire: ICD-10 symptom list; Hospital Anxiety Depression Scale; HADS; SF-36
Standard psychiatric criteria for depression developed in the United States and United Kingdom are increasingly used worldwide to establish the prevalence of clinical disorders and to help develop services. However, these approaches are rarely sensitive to local and cultural expressions of symptoms or beliefs about treatment. Mismatch between diagnostic criteria and local understanding may result in underreporting of depression and underutilization of services. Little such research has been conducted in Malaysia, despite the acknowledged high rate of depression and low access to services. This study examines depression in Moslem Malay women living in Johor Bahru, Southern Peninsular Malaysia, to explore depression symptoms using the Structured Clinical Interview for DSM-IV. The 61 women interviewed were selected on the basis of high General Health Questionnaire scores from a large questionnaire survey of 1,002 mothers. The illustrative analysis looks at descriptions of depressed mood, self-depreciation and suicidal ideation, as well as attitudes toward service use. The women gave full and open descriptions of their emotional symptoms, easily recognizable by standard symptom categories, although somatic symptoms were commonly included, and the spiritual context to understanding depression was also prevalent. However, few women had knowledge about treatment or sought medical services, although some sought help from local spiritual healers. Attending to such views of depression can help develop services in Malaysia.