Table 1. Characteristics of data collection, abstraction, and management at audit sites A–G.

	Sites
Characteristic	A	B	C	D	E	F	G
Structured patient follow-up visit form	Yes	no	no	no	no	no	no
Drug dispensing form	no	no	no	Yes	no	Yes	Yes
Electronic laboratory system	no	Yes	Yes	no	no	Yes	no
On-site research database (vs. commercially hosted and managed database)	Yes	Yes	Yes	Yes	no	Yes	Yes
Data manager	Yes	Yes	Yes	Yes	no	no	Yes
Full-time data abstraction team	no	no	no	Yes	no	no	Yes
Internal data audits	no	no	no	no	no	Yes	no