Table 4. Variable counts and error rates by data category during initial and follow-up audits at a single site.

	InitialSite Audit		Follow-up Site Audit
	N	%err	N	%err
Variables
Gender	23	0%	26	0%
Birth date	23	9%	26	8%
Weight	37	41%	42	26%
Weight date	37	30%	42	21%
Laboratory data
CD4	33	21%	35	6%
CD4 date	33	27%	35	6%
Viral load	26	42%	32	16%
Viral load date	26	42%	32	13%
Antiretroviral regimen data
Regimen	54	26%	65	12%
Start date	54	56%	64	23%
Stop date	54	50%	64	33%
All	400	34%	463	17%