Table 2.

Findings from the 13 clinical trials (17 patient groups) included in this meta-analysis

		Decrement in blood pressure with drug treatment (mm Hg)
		Systolic					Diastolic
Trial	Standardized mean dose (mg/d)	White mean	Black mean	White-black difference	White SD	Black SD	White mean	Black mean	White-black difference	White SD	Black SD
1	20	14.7	9.1	5.6	15.6	14.7	10.7	7.9	2.8	7.8	8.6
2	20	10.8	0.7	10.1	16.4	3.6	9	4.1	4.9	9.1	11.6
3	5	*	*	*	*	*	8	1.5	6.5	15.1	11.7
4a	16	11	8	3	9	11	10	9	1	7	7
4b	16	11	7	4	9	12	11	7	4	5	7
5a	10	12.8	2.7	10.1	15	13.9	6.1	2	4.1	4.3	4.8
5b	20	9.6	2.5	7.1	15	13.1	8.1	3.8	4.3	5.1	5.2
5c	40	9.1	11.9	-2.8	13.8	13.4	8.9	6.5	2.4	4.4	5.3
6	20	*	*	*	*	*	11.8	6.2	5.6	7.8	10
7	24	14.1	7.8	6.3	10.2	14.4	10.2	6.2	4	6.2	11.5
8a	20	13.4	8.5	4.9	16.3	12.9	9.8	7.3	2.5	8.1	7.5
8b	40	16.8	12.3	4.5	18.5	20	12	10.1	1.9	8.5	11.3
9	30	5.9	9.2	-3.3	13.7	11.9	2.2	3.1	- 0.9	8.1	11.7
10	18	18.2	14.3	3.9	16.3	17.3	10.6	9	1.6	9.6	10.5
11	*	15.3	10.6	4.7	12.2	13.4	9.8	7.4	2.4	7.8	7.8
12	40	11	5	6	14.2	15.3	7	3	4	7.8	8.7
13	15	9.5	0.9	8.6	15.8	19.9	*	*	*	*	*

SD indicates standard deviation. *Results not reported.