a Age-specific General Health Questionnaire caseness in males aged over 16 years, 1991–2014. Groupings: age 16–30 years (younger working-age); age 31–64 years (older working-age); age over 65 years (retirement-age). All estimates from two pooled years of data collection.
b: Age-specific General Health Questionnaire caseness in females aged over 16 years, 1991–2014. Groupings: age 16–30 years (younger working-age); age 31–64 years (older working-age); age over 65 years (retirement-age). All estimates from two pooled years of data collection.