Skip to main content

Table 1 Clinical characteristic of subjects in the RA outpatient population, non-RA outpatient population and the general population (NHANES)

From: Association between inflammation and systolic blood pressure in RA compared to patients without RA

Characteristic Outpatient population
N = 24,325
NHANES*
N = 5561
RA
N = 1811
Non-RA
N = 22,514
Age, years, mean (SD) 60.39 (13.97) 54.00 (15.55) 47.88 (18.49)
Female (%) 80.18 61.03 50.46
Ethnicity (%)
 Non-Hispanic white 80.51 80.40 48.48
 Non-Hispanic black 5.63 5.46 16.90
 Others 13.86 14.14 34.62
Anti-hypertensive medication use (%) 23.47 25.38 30.30
Statin medication use (%) 10.38 12.92 17.59
CRP, mg/L, median (IQR) 3.40 (1.40, 9.00) 2.20 (0.90, 5.80) 0.18 (0.07, 0.43)
SBP, mmHg, mean (SD) 129.92 (17.12) 126.48 (16.81) 122.14 (18.26)
DBP, mmHg, mean (SD) 75.62 (11.47) 76.07 (15.66) 69.30 (11.92)
PP, mmHg, mean (SD) 54.30 (14.57) 50.41 (17.94) 52.83 (17.51)
MAP, mmHg, mean (SD) 93.72 (11.76) 92.87 (13.65) 86.91 (11.74)
  1. RA rheumatoid arthritis, NHANES National Health and Nutrition Examination Survey, CRP C-reactive protein, SBP systolic blood pressure, DBP diastolic blood pressure, PP pulse pressure, MAP mean arterial pressure