Table 1.

Characteristics of study cohort (n=92)

Variable	Tertiles of SBP coefficient of variation
	All	1 (lowest variability)	2	3 (highest variability)	P value
	N (%)	N (%)	N (%)	N (%)
All, n (row %)	92 (100.00%)	31 (33.70%)	30 (32.61%)	31 (33.70%)
Age, mean (SD)	44.71 (12.16)	45.03 (14.29)	45.93 (12.54)	43.19 (9.41)	0.673
Female	50 (54.35%)	18 (58.06%)	20 (66.67%)	12 (38.71%)	0.08
White race	76 (82.61%)	29 (93.55%)	25 (83.33%)	22 (70.97%)	0.063
Within-subject SBP
Mean (mm Hg), mean (SD)	124.05 (13.19)	128.01 (12.98)	118.16 (11.86)	125.78 (13.00)	0.008
SD (mm Hg), mean (SD)	9.94 (4.59)	5.82 (2.05)	9.17 (1.41)	14.79 (3.91)	<0.001
Maximum (mm Hg), mean (SD)	137.95 (15.11)	135.74 (13.70)	132.60 (12.37)	145.32 (16.34)	0.002
Minimum (mm Hg), mean (SD)	110.68 (14.19)	120.45 (13.11)	105.43 (11.24)	106.00 (12.95)	<0.001
Number of measures, mean (SD)	7.93 (5.53)	6.29 (3.97)	10.33 (6.18)	7.26 (5.57)	0.011
Body mass index (kg/m²), mean (SD)	29.03 (6.02)	28.73 (5.64)	28.04 (5.25)	30.28 (6.99)	0.33
Depression	19 (20.65%)	4 (12.90%)	11 (36.67%)	4 (12.90%)	0.031
Hypertension	28 (30.43%)	13 (41.94%)	9 (30.00%)	6 (19.35%)	0.154
PDDS score, mean (SD)	2.22 (1.89)	1.52 (1.95)	2.73 (1.70)	2.42 (1.86)	0.031
PDDS score, median (IQR)	2 (0–4)	0 (0–3)	3 (1–4)	2 (1–4)
PDDS score (3 groups)
No or mild (0–1)	40 (43.48%)	19 (61.29%)	9 (30.00%)	12 (38.71%)	0.163
Moderate (2–3)	27 (29.35%)	6 (19.35%)	11 (36.67%)	10 (32.26%)
Severe (4 or higher)	25 (27.17%)	6 (19.35%)	10 (33.33%)	9 (29.03%)

All percentages are either column percentages (col. %) or row percentages (row %). P-values for continuous variables were computed using one-way analysis of variance and those for categorical variables were based on Pearson χ²tests.

PDDS, patient-determined disease steps; SBP, systolic blood pressure.