Table 3.

Model outcomes for rate and odds ratios of patient visits, tested for HIV, and tested positive for HIV; Tanzania Health Information Technology (T-HIT) electronic records compared with paper records in T-HIT sites and comparison sites.

Variable and category			Rate ratio (95% CI)	P value
Rate ratios for the number of patients seen weekly
	Week		0.99 (0.97-1.00)	.14
	Record group			.20a
		T-HIT electronic versus non-T-HIT paper (week 18)	1.52 (0.87-2.66)	.14
		T-HIT electronic versus T-HIT paper (week 18)	1.14 (0.67-1.95)	.63
		T-HIT paper versus non-T-HIT paper (week 18)	1.11 (0.61-2.01)	.74
	Phase
		Post intervention versus pre intervention	1.04 (0.71-1.53)	.83
	Week×phase interaction
		Post intervention versus pre intervention	1.00 (0.98-1.03)	.75
Odds ratios for the number of patients who were tested for HIV
	Week		0.95 (0.86-1.06)	.35
	Record group			.77a
		T-HIT electronic versus non-T-HIT paper (week 18)	0.89 (0.27-2.90)	.85
		T-HIT electronic versus T-HIT paper (week 18)	0.65 (0.24-1.79)	.41
		T-HIT paper versus non-T-HIT paper (week 18)	1.28 (0.26-6.16)	.76
	Phase
		Post intervention versus pre intervention	0.06 (0.01-0.29)	.001
	Week×phase interaction
		Post intervention versus pre intervention	1.10 (0.97-1.23)	.13
Odds ratios for the number of those tested who were positive for HIV
	Week×phase interaction
		Post intervention versus pre intervention	0.95 (0.91-1.00)	.04
		Preintervention effect of week	0.98 (0.94-1.04)	.55
		Postintervention effect of week	0.94 (0.89-0.98)	.004
	Record group			.69a
		T-HIT electronic versus non-T-HIT paper (week 18)	0.67 (0.24-1.82)	.43
		T-HIT electronic versus T-HIT paper (week 18)	0.78 (0.23-2.63)	.68
		T-HIT paper versus non-T-HIT paper (week 18)	0.41 (0.19-0.89)	.02
	Phase
		Post intervention versus pre intervention	6.43 (2.26-18.35)	.001

^aType 3 P values.