Linkage
Administrative record linkage techniques were employed to match cases with the exposure (conception via IVF) through to childhood outcome data. Data linkage was performed by the Centre for Victorian Data Linkage (CVDL), a third-party government-funded data linkage unit [Two separate, linked study populations were identified, children with a linked AEDC record and children with a linked NAPLAN record. These 2 cohorts were analysed and are reported separately. Some children were included in both cohorts.