Table 2.

Cross tabulation of quartiles of visit-to-visit standard deviation (SD_VVV) and day-night standard deviation (SD_dn) of systolic blood pressure (top panel) and diastolic blood pressure (bottom panel).

		Quartile of day-night standard deviation of SBP from ambulatory monitoring (range in mmHg)
		1 (<7.45)	2 (7.45 – 8.49)	3 (8.50 – 9.93)	4 (≥ 9.94)
Quartile of VVV standard deviation of SBP (range in mmHg)	1 (<4.41)	12	11	9	4
	2 (4.41 – 5.95)	10	10	10	7
	3 (5.96 – 7.99)	10	7	10	10
	4 (≥ 8.00)	4	9	8	15

		Quartile of day-night standard deviation of DBP from ambulatory monitoring (range in mmHg)
		1 (<6.36)	2 (6.36 – 7.10)	3 (7.11 – 8.39)	4 (≥ 8.40)
Quartile of VVV standard deviation of DBP (range in mmHg) (range in mmHg)	1 (<3.40)	9	7	12	8
	2 (3.40 – 4.36)	8	12	6	11
	3 (4.37 – 5.62)	11	8	11	7
	4 (≥ 5.63)	8	10	8	10

Numbers in table represent number of study participants

Weighted Kappa statistic = 0.17

Observed-to-expected ratio for highest quartile: 1.66 (95% CI: 0.93 – 2.75)

Numbers in table represent number of study participants

Weighted Kappa statistic = 0.01

Observed-to-expected ratio for highest quartile: 1.11 (95% CI: 0.56 – 1.98)

Calculated via: http://www.sph.emory.edu/~cdckms/exact-midP-SMR.html

VVV – visit-to-visit variability