Association between common mental disorders (CMDs), equity, poverty and socio-economic functioning are relatively well explored in high income countries, but there have been fewer studies in low and middle income countries, despite the considerable burden posed by mental disorders, especially in Africa, and their potential impact on development. This paper reports a population-based epidemiological survey of a rural area in Kenya. A random sample of 2% of all adults living in private households in Maseno, Kisumu District of Nyanza Province, Kenya (50,000 population), were studied. The Clinical Interview Schedule-Revised (CIS-R) was used to determine the prevalence of common mental disorders (CMDs). Associations with socio-demographic and economic characteristics were explored. A CMD prevalence of 10.8% was found, with no gender difference. Higher rates of illness were found in those who were of older age and those in poor physical health. We conclude that CMDs are common in Kenya and rates are elevated among people who are older, and those in poor health.

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There have been few epidemiological surveys to establish prevalence and associated risk factors of psychosis in Sub-Saharan Africa. This paper reports a population- based epidemiological survey in rural Kenya of the prevalence of psychotic symptoms and their relationship with demographic, socio-economic and other risk factors. A random sample of 2% of all adults living in Maseno, Kisumu District of Nyanza province, Kenya (50,000 population) were studied, aiming for a sample size of 1,000 people. The psychosis screening questionnaire was used to assess the prevalence of psychotic symptoms in the preceding twelve months. The response rate was 87.6%. The prevalence of single psychotic symptoms in rural Kenya was 8% of the adult population, but only 0.6% had two symptoms and none had three or more psychotic symptoms in this sample size. Psychotic symptoms were evenly distributed across this relatively poor rural population and were significantly associated with presence of common mental disorders, and to a lesser extent with poor physical health and housing type. We conclude that single psychotic symptoms are relatively common in rural Kenya and rates are elevated in those with CMD, poor physical health and poor housing.

The prevalence of psychiatric morbidity among rural and urban Kenyan primary care attenders has been reported to be as high as 63% (Ndetei & Muhangi, 1979; Dhapdale & Ellison, 1983; Dhapdale et al, 1989; Sebit, 1996). For its population of 32 million, Kenya has only 16 psychiatrists and 200–300 psychiatric nurses, but there are just over 2000 primary healthcare centres, staffed by general nurses and clinical officers, and the main burden for assessing and caring for people with mental disorders falls upon members of the primary care teams. However, mental disorders are poorly recognised (Dhapdale & Ellison, 1983) and inadequately treated in primary care (Muluka & Dhapdale, 1986). Moreover, Kenyan primary care workers often lack training in mental health (Dhapdale et al, 1989; see also Ndetei, this issue, p. 31).

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