Adjusted risk of rapid repeat pregnancy occurring within 12 months of a prior live birth among women with and without intellectual and developmental disabilities (IDDs), stratified by factors expected to directly affect the risk of rapid repeat pregnancy. Data are presented as number (%) of rapid repeat pregnancies among women with and without IDDs, adjusted relative risks (RRs) and 95% confidence intervals (CIs) for associations, and p values for interaction terms between disability status and effect modifiers. Adjusted stratified models controlled for all variables except that used for stratification, from among age, parity, urban residence, neighbourhood income quintile, social assistance, stable and unstable chronic medical conditions, mental illness and continuity of primary care. Note: ref = reference.