Statistical analysis
We described maternal characteristics of women who were dispensed at least one of the selected medications during the 6-weeks diary period and women who did not use medication according to the pharmacy records. For each medication registered in the pharmacy records with theoretical use in the diary period, we determined actual use with Wilson score 95% confidence intervals (CIs), initiation, and implementation adherence for the three predefined medication categories, medication groups, and individual medications with ≥5 prescription dispensings. For implementation adherence, we calculated the mean proportion of days with at least the correct number of doses taken as well as the proportion of users with an implementation adherence ≥80%. To evaluate whether the maternal characteristics were associated with implementation adherence, we used univariable linear regression with robust standard errors to account for multiple prescriptions per participant in an exploratory analysis. All statistical analyses were performed using Stata version 16.0 (StataCorp LLC, College Station, TX).