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Inequalities in rates of gonorrhoea and chlamydia between black ethnic groups in south east London: cross sectional study
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- Published on: 13 May 2016
- Published on: 13 May 2016Cross sectional study of self-selected patients: a valid design to evaluate incidence?Dear EditorShow More
Low and colleagues present a very important paper. They should be given the opportunity to remove my doubts about the validity of their findings: They used a cross sectional design to determine incidence; however, unless the average duration of conditions is known longitudinal studies are required to determine this. The presented study assessed disease status of self-selected participants over a period of...
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