Table A2.

Summary of Compliance for the First 2 Years of Study

Compliance	Follow-Up Time
	0-3 Months	3-6 Months	6-9 Months	9-12 Months	12-15 Months	15-18 Months	18-21 Months	21-24 Months
No. of patients	1,237	1,245	932	1,000	786	864	671	732
Count estimate
Pill count
No. of patients	129	1,143	79	930	82	815	45	691
%	10	92	8	93	6	94	7	94
Telephone
No. of patients	1,180	103	853	70	738	49	626	41
%	90	8	92	7	94	6	93	6
Taking 1 pill a day almost always
No./Total No.	1,182/1,234	1,159/1,236	901/927	950/992	757/780	826/857	650/666	701/727
%	96	94	97	96	97	96	98	96
Compliance ratio
By pill count
Median	1.00	0.99	1.00	0.99	1.00	0.99	1.00	0.99
Interquartile range	0.95-1.00	0.97-1.00	0.92-1.00	0.95-1.00	0.91-1.00	0.96-1.00	0.95-1.00	0.95-1.00
By telephone
Median	1.10	1.00	1.09	0.96	1.08	0.90	1.09	0.82
Interquartile range	1.00-1.20	0.84-1.07	1.00-1.20	0.80-1.01	0.99-1.19	0.81-1.05	0.99-1.20	0.74-0.95