Table 2.

Systolic blood pressure variability according to quartiles of C-reactive protein and tumor necrosis factor- alpha. Results of multivariable-adjusted linear regression models.

Inflammatory Markers	Mean* (95% CI) Within-Subject Standard Deviation of Daytime Systolic Blood Pressure	Mean† (95% CI) Within-Subject Standard Deviation of Nighttime Systolic Blood Pressure	Mean‡ (95% CI) Within-Subject Standard Deviation of 24-Hour Systolic Blood Pressure
CRP Quartiles
(< 0.5 mg/L)	9.3 (8.5, 10.2)	7.9 (6.8, 9.0)	11.2 (10.2, 12.2)
(0.5 mg/L to < 1.2 mg/L)	9.6 (8.8, 10.4)	9.2 (8.2, 10.2)	11.3 (10.4, 12.2)
(1.2 mg/L to < 2.9 mg/L)	10.6 (9.8, 11.4)	9.7 (8.7, 10.7)	12.1 (11.2, 12.9)
(≥ 2.9 mg/L)	11.2 (10.4, 12.0)	10.3 (9.3, 11.3)	12.8 (11.9, 13.7)
	P for linear trend = .001	P for linear trend = .008	P for linear trend = .01
TNF-α Quartiles
(< 0.7 pg/ml)	10.2 (9.4, 11.0)	9.5 (8.5, 10.4)	12.1 (11.2, 12.9)
(0.7 pg/ml to < 0.9 pg/ml)	9.7 (8.9, 10.5)	9.7 (8.7, 10.7)	11.8 (11.0, 12.7)
(0.9 pg/ml to < 1.4 pg/ml)	10.5 (9.7, 11.3)	8.0 (7.0, 9.1)	11.6 (10.7, 12.5)
(≥ 1.4 pg/ml)	10.3 (9.5, 11.0)	9.9 (8.9, 10.8)	11.8 (11.0, 12.7)
	P for linear trend = .66	P for linear trend = .99	P for linear trend = .48

^*Means adjusted for age, sex, race, BMI, quartiles of the other inflammatory marker, and mean daytime systolic BP

^†Means adjusted for age, sex, race, BMI, quartiles of the other inflammatory marker, and mean nighttime systolic BP

^‡Means adjusted for age, sex, race, BMI, quartiles of the other inflammatory marker, and mean 24-hour systolic BP

BMI = body mass index; BP = blood pressure; CRP = C-reactive protein; TNF-α = tumor necrosis factor-alpha