Table 1

Baseline characteristics according to systolic blood pressure categories
Systolic blood pressure categories
All <130 mm Hg 130-139 mm Hg 140-159 mm Hg ≥160 mm Hg
Characteristics N = 7 333 (n = 1278) (n = 1315) (n = 2623) (n = 2117) p-values*
Age, years, mean (SD) 51.6 51.2 51.3 51.6 51.9 <0.0001
(2.3) (2.3) (2.4) (2.3) (2.1)
Body Mass Index kg/m2, mean (SD) 25.5 24.4 25.2 25.6 26.3 <0.0001
(3.2) (2.9) (2.9) (3.2) (3.5)
Obesity. BMI ≥30, % (n) 8.1 3.4 5.6 8.2 12.6 <0.0001
(597) (43) (73) (214) (267)
Diastolic blood pressure, mm Hg, mean (SD) 95 82 88 94 107 <0.0001
(13) (8) (8) (8) (12)
Hypertension treatment, % (n) 5.4 0.7 0.7 3.2 13.8 <0.0001
(396) (9) (9) (85) (293)
Serum cholesterol mmol/L, mean (SD) 6.46 6.22 6.47 6.47 6.61 <0.0001
(1.15) (1.08) (1.10) (1.17) (1.18)
Never smokers, % (n) 29.5 27.2 27.1 29.7 32.0 0.0004
(2152) (347) (355) (775) (675
Former smokers, % (n) 20.4 19.0 20.9 21.3 20.0 0.68
(1493) (242) (273) (555) (423)
Current smokers, % (n) 50.1 53.8 52.0 49.0 48.0 0.0004
(3660) (686) (681) (1279) (1014)
Physically active, % (n) 16.0 18.3 17.6 16.1 13.5 <0.0001
(1156) (232) (228) (414) (282)
Non-manual occupation 27.9 31.2 29.4 27.8 25.1 <0.0001
(2044) (399) (386) (728) (531)

SD = standard deviation. BMI=Body Mass Index. *P-values calculated by chi-square trend test for categorical variables and by Spearman correlation test for continuous variables.

Stahl et al.

Stahl et al. BMC Cardiovascular Disorders 2012 12:89   doi:10.1186/1471-2261-12-89

Open Data