3. Types of epidemiological studies

Cross sectional studies

3.1 Descriptive studies (continued)

Example of a descriptive study that is a cross-sectional study (c) : prevalence of sexually transmitted infections in Moscow among risk groups (Shakarishvili, Lancet 20051)

Figure 4 : Prevalence of HIV and sexually transmitted infections according to study sites and sex

Figure 4 : Prevalence of HIV and sexually transmitted infections according to study sites and sex

1 Shakarishvili A, Dubovskaya LK, Zohrabyan LS, et al. Sex work, drug use, HIV infection, and the spread of sexually transmitted infections in Moscow, Russian Federation. Lancet 2005; 366:57–60.