Impact of AIDS on adult mortality: a morgue-based study in Pointe-Noire, Republic of Congo

Objective: To measure the impact of AIDS on adult mortality by systematically investigating all deaths during 3 months, in the city of Pointe-Noire where the HIV epidemic emerged 20 years ago and levelled-off around 5% among adults. Design: Exhaustive morgue-based study, in a city where by law all bodies should be registered at the morgue before they can be legally buried. Methods: From 30 June to 19 October 2001, a clinical examination of all bodies registered at the morgue was performed by a physician, and blood samples were systematically drawn for HIV testing. Relatives were interviewed on circumstances of death. Additional information was gathered from hospital files for cases previously hospitalized. Age- and sex-specific mortality rates were calculated using the population at risk derived from the 2001 census. Results: Overall, 1309 adult deaths were investigated and 96.5% of the bodies registered at the morgue were tested for HIV. Forty-five percent of the deaths (570) were due to AIDS. The HIV prevalence was higher in female than in male deaths (57.1 versus 44.8%; P < 0.001). The AIDS-mortality rate among adults was 6.3 per thousand for women and 4.9 per thousand for men. Among 1000 young adults aged 15 years, 442 girls and 482 boys will not reach age 60 years (45q15). Without AIDS these would have been 216 and 307, respectively. Conclusions: Our study provides a direct measure of the impact of AIDS on mortality relative to other causes. In the most productive age group, 25–44 years, mortality is tripled by AIDS