Fig. 1

Prevalence of obesity among women who participated in the Australian National Health Surveys (NHS) conducted in 1995 (measured heights and weights), 2001 (self-reported heights and weights), 2004–5 (self-reported), 2007–8 (measured), 2011–12 (measured), 2014–15 (measured) and 2017–18 (measured); approximately 6000–8000 women at each survey. a (top left) by age for each survey; b (top right) by survey for selected ages; c (bottom left) by age for synthetic cohorts defined by year of birth and plotted by quartiles of year of birth; d (bottom right) by cohort for selected ages and excluding self-reported data from the 2001 and 2004–5 surveys