The supplemental .zip archive for this publication contains the following files. Please note that the Stata files were created using Version 17 and may not be compatible with earlier versions. 0. Data Access instructions and basic meta-information about the data files 1. Stata program file to merge datasets and analyse the association between maternal mental health and early childhood development (ECD): 1_ECD_Maternal_MH 2. Stata program file to analyse the association between paternal mental health and early childhood development (ECD): 2_ECD_Paternal_MH