Table 1 Descriptive statistics on study subjects and blood pressure measurements.

From: Short-term effects of air pollution on blood pressure

Values

Total (n = 98,577)

Hypertension (n = 31,267)

Normotension (n = 67,310)

Age, years

55.5 ± 14.9

61.8 ± 14.1

52.6 ± 14.4

Male sex, n (%)

49,452 (50.2)

16,866 (53.9)

32,586 (48.4)

Body mass index, kg/m2*

23.83 ± 0.49

25.16 ± 0.41

23.83 ± 0.49

Blood pressure measurements

   Systolic blood pressure, mmHg

122.8 ± 16.3

127.1 ± 17.8

120.8 ± 15.1

   Diastolic blood pressure, mmHg

74.1 ± 11.1

75.6 ± 11.8

73.4 ± 10.6

   Pulse rate, per minute

79.3 ± 13.4

78.3 ± 13.8

79.8 ± 13.2

Comorbidities

   Diabetes mellitus, n (%)

7553 (7.7)

5732 (18.3)

1821 (2.7)

   Dyslipidemia, n (%)

10,288 (10.4)

6584 (21.1)

3704 (5.5)

Medication, n (%)

Antihypertensive agents

   ACEI/ARB

13,582 (13.8)

13,582 (43.4)

   Calcium channel blockers

17,505 (17.8)

17,505 (56.0)

   β-blockers

17,090 (17.3)

17,090 (54.7)

   Diuretics

7565 (7.7)

7565 (24.2)

Statin

17,813 (18.1)

13,632 (43.6)

4181 (6.2)

  1. Data are reported as numbers and percentages for categorical variables and mean ± standard deviation (SD) for continuous ones. *Body mass index was only available in 59,215 subjects (61.1%).
  2. ACEI denotes angiotensin-converting-enzyme inhibitor; ARB, angiotensin II receptor blockers.