Supplementary Appendix A: Table S1. The intervention package within the Salut Programme targeting parents and their children from foetal life to 1.5 years of age. Table S2. Unit costs used in costing analysis (in 2020 $US) - average estimates from Cost per patient database. Table S3. Mean costs per mother per child related to resource use in the Salut and the non-Salut areas, before matching, for the total sample (in 2020 $US). Table S4. Mean costs per mother per child related to resource use in the Salut and the non-Salut areas, before matching, for the longitudinal sample (in 2020 $US).