Table 2.

Sample and response rates.

	Patients, n		Mean age, years		Women, %
Condition	Invited	Study population (%)	Invited	Study population	Invited	Study population
Asthma	402	253 (63)	45	50	53	56
Hypertension	399	304 (76)	67	67	58	59
Depression	529	279 (53)	45	50	69	72
Osteoarthritis	393	320 (81)	70	70	65	65
All	1723	1156 (67)	56	60	62	63