title: What's the denominator?
authors.affiliation: Mestrado em Epidemiologia, Universidade Federal de Pelotas, Brazil.
authors.forename: C G
authors.initials: CG
authors.lastname: Victora
mesh_terms: D015981:Epidemiologic Factors; D004812:Epidemiologic Methods; D006801:Humans; D015994:Incidence; D011153:Population; D015995:Prevalence; D012306:Risk; D013223:Statistics as Topic