. 2012 May 7;14(6):396–400. doi: 10.1111/j.1751-7176.2012.00641.x

Table II.

Comparison of Mean Systolic Blood Pressure From 6‐Hour Intervals vs Daytime and Full 24‐Hour ABPM by Group and Start Time

6‐H Start Time	Group	No.	6‐H Mean (SD)	6‐H vs Daytime		6‐H vs 24‐H
6‐H Start Time	Group	No.	6‐H Mean (SD)	Difference Mean (SD)^a	CCC	Difference Mean (SD)^a	CCC
7 am	Norm	20	115.7 (8.0)	0.6 (2.6)	0.94	−1.9 (2.9)	0.90
7 am	HTN	7	139.0 (7.9)	−0.2 (4.3)	0.86	−4.7 (4.8)	0.63
8 am	Norm	34	116.9 (7.5)	0.6 (2.7)	0.93	−2.5 (3.2)	0.85
8 am	HTN	11	132.2 (6.5)	1.1 (3.5)	0.87	−2.9 (4.0)	0.76
9 am	Norm	33	116.4 (8.3)	0.2 (2.7)	0.94	−2.7 (3.2)	0.85
9 am	HTN	10	133.0 (6.7)	0.6 (2.8)	0.93	−3.0 (3.5)	0.81
10 am	Norm	40	118.9 (9.0)	0.3 (2.9)	0.94	−3.0 (3.5)	0.85
10 am	HTN	11	130.9 (7.2)	0.4 (3.0)	0.91	−3.8 (3.5)	0.76
11 am	Norm	43	118.9 (8.8)	0.2 (2.5)	0.96	−2.9 (3.2)	0.87
11 am	HTN	15	131.8 (7.4)	1.7 (3.7)	0.86	−2.2 (4.1)	0.82
12 pm	Norm	61	117.8 (8.4)	0.2 (2.7)	0.95	−2.9 (3.3)	0.86
12 pm	HTN	23	135.1 (9.7)	0.0 (3.7)	0.92	−4.1 (4.5)	0.78
1 pm	Norm	65	118.4 (8.2)	−0.2 (2.6)	0.95	−3.4 (3.2)	0.84
1 pm	HTN	26	135.5 (9.9)	−0.4 (3.1)	0.95	−4.5 (3.9)	0.81
2 pm	Norm	72	119.1 (9.0)	−0.8 (2.3)	0.96	−3.9 (2.8)	0.85
2 pm	HTN	29	135.0 (10.4)	−0.7 (3.1)	0.95	−4.5 (4.0)	0.81
3 pm	Norm	75	118.9 (8.8)	−0.6 (2.8)	0.94	−4.3 (3.0)	0.82
3 pm	HTN	29	134.7 (11.4)	−0.5 (4.2)	0.92	−4.6 (4.8)	0.79
4 pm	Norm	75	119.1 (8.8)	−1.1 (2.5)	0.95	−4.7 (3.0)	0.80
4 pm	HTN	28	135.8 (11.3)	−0.8 (3.8)	0.93	−5.2 (5.1)	0.75

Abbreviations: ABPM, ambulatory blood pressure monitoring; CCC, concordance class coefficient; HTN, hypertensive group (n=35); Norm, Normotensive group (n=96); SD, standard deviation. ^aDifference=daytime period minus 6‐hour period; full 24‐hour period minus 6‐hour period.