Skip to main content

Table 2 Differences in day-night standard deviation of blood pressure across quartiles of forced-expiratory-volume-in-1-second and forced-vital-capacity

From: The association of reduced lung function with blood pressure variability in African Americans: data from the Jackson Heart Study

 

Quartile 1 (lowest)

Quartile 2

Quartile 3

Quartile 4 (highest)

p-trend

 

Forced expiratory volume in 1 s

Systolic blood pressure

(n = 251)

(n = 253)

(n = 253)

(n = 251)

 

Mean ± standard deviation

9.5 ± 2.5

9.4 ± 2.4

9.1 ± 2.3

9.3 ± 2.6

0.111

Model 1, β (95 % CI)

0 (ref)

0.0 (−0.4 to 0.4)

−0.4 (−0.8 to 0.1)

−0.3 (−0.7 to 0.1)

0.041

Model 2, β (95 % CI)

0 (ref)

0.1 (−0.4 to 0.5)

−0.1 (−0.5 to 0.3)

−0.0 (−0.4 to 0.4)

0.775

Diastolic blood pressure

     

Mean ± standard deviation

8.1 ± 2.1

8.2 ± 2.1

8.1 ± 2.3

8.0 ± 2.0

0.318

Model 1, β (95 % CI)

0 (ref)

0.0 (−0.4 to 0.4)

−0.1 (−0.4 to 0.3)

−0.2 (−0.6 to 0.2)

0.321

Model 2, β (95 % CI)

0 (ref)

−0.1 (−0.5 to 0.3)

−0.1 (−0.5 to 0.3)

−0.2 (−0.6 to 0.2)

0.393

 

Forced vital capacity

Systolic blood pressure

(n = 251)

(n = 253)

(n = 253)

(n = 251)

 

Mean ± standard deviation

9.6 ± 2.5

9.3 ± 2.5

9.1 ± 2.4

9.3 ± 2.4

0.054

Model 1, β (95 % CI)

0 (ref)

−0.2 (−0.6 to 0.2)

−0.5 (−0.9 to −0.1)

−0.5 (−0.9 to −0.1)

0.009

Model 2, β (95 % CI)

0 (ref)

−0.1 (−0.6 to 0.3)

−0.3 (−0.7 to 0.2)

−0.1 (−0.5 to 0.3)

0.495

Diastolic blood pressure

     

Mean ± standard deviation

8.3 ± 2.1

8.1 ± 2.3

7.8 ± 2.1

8.1 ± 2.1

0.155

Model 1, β (95 % CI)

0 (ref)

−0.1 (−0.5 to 0.2)

−0.5 (−0.8 to −0.1)

−0.2 (−0.6 to 0.2)

0.157

Model 2, β (95 % CI)

0 (ref)

−0.3 (−0.7 to 0.1)

−0.5 (−0.9 to −0.1)

−0.1 (−0.5 to 0.3)

0.348

  1. Forced expiratory volume in 1 s quartile cut points (lowest to highest quartile):
  2. Men: < 80.7, 80.7 to 91.8, 91.8 to 101.1, and ≥ 101.1
  3. Women: < 83.8, 83.8 to 95.4, 95.4 to 106.8, and ≥ 106.8
  4. Forced vital capacity quartile cut points (lowest to highest quartile):
  5. Men: < 81.4, 81.4 to 90.4, 90.4 to 99.8, and ≥ 99.8
  6. Women: < 83.3, 83.3 to 94.2, 94.2 to 105.2, and ≥ 105.2
  7. CI: confidence interval
  8. Model 1: adjustment for demographics (age and sex)
  9. Model 2: Adjustment for Model 1 variables plus behaviors (pack years of cigarette smoking, physical activity, and body mass index), co-morbid conditions (diabetes, total and HDL-cholesterol and statin use, history of stroke and history of myocardial infarction), kidney function (estimated glomerular filtration rate and albuminuria), markers of inflammation (C-reactive protein), mean daytime SBP or DBP and antihypertensive medication classes being taken