Moderating effects of (a, b) urban residence (– – –, urban; ——, rural) and (c, d) mother's education (——, post-secondary; – – –, secondary; - - -, primary; · · ·, no schooling) on predicted obesity prevalence according to national income (gross per capita and adjusted for purchasing power parity) among children (a, c) and mothers (b, d). Data analysed were from ninety-five nationally representative health and nutrition surveys conducted between 1990 and 2008 in thirty-three less developed countries, sample included children aged 2–4 years (n 253 442) and their mothers (n 228 655)