Fig. 2From: Flexible age-period-cohort modelling illustrated using obesity prevalence dataPrevalence of obesity among participants in the Australian Longitudinal Study on Women’s Health (ALSWH) born in 1989–95, 1973–78, 1946–51 and 1921–26 and surveyed approximately every 3 years (self-reported heights and weights). a (top left) by age for survey waves shown as smoothed curves (fractional polynomials); b (top right) by year of survey by age group shown as smoothed curves (fractional polynomials); c (bottom left) by age for the four cohorts defined by year of birth; d (bottom right) by cohort for selected ages (with the largest numbers of observations)Back to article page