highly significantP <0.0001
The P -values for the interaction terms between each of education level and wealth quintile and the time period variable were highly significant ( P <0.0001 in all models for both unadjusted and adjusted estimates).
The P -values for the interaction terms between each of education level and wealth quintile and the time period variable were highly significant ( P <0.0001 in all models for both unadjusted and adjusted estimates).