Table 2 Sociodemographic and health characteristics of WHO–SAGE nested salt study sample, South Africa Wave 2 (2015)

From: Prediction of 24-hour sodium excretion from spot urine samples in South African adults: a comparison of four equations

 

Nested salt study N = 438

Male n = 106

Female n = 332

Age, years

55 (40–65)

52 (37–63)

56 (43–65)

50 years and above, n (%)

284 (65)

61 (58)

223 (67)

Ethnicity, n (%)

  Black African

319 (73)

78 (74)

241 (73)

  Coloured

73 (17)

16 (15)

57 (17)

  Indian

36 (8)

7 (7)

29 (9)

  White

10 (2)

5 (5)

5 (2)

Rural, n (%)

129 (30)

30 (28)

99 (30)

Education, years

9 (7–12)

10 (6–12)

8 (6–12)

BMI, kg/m2

29.1 (24.2–34.7)

25.6 (22.3–29.7)

30.4 (25.7–35.6)

Waist-to-height ratio

0.58 (0.50–0.66)

0.53 (0.46–0.59)

0.61 (0.52–0.68)

Systolic BP, mmHg

129 (118–142)

129 (119–143)

128 (118–142)

Diastolic BP, mmHg

80 (73–88)

82 (74–89)

80 (72–88)

MAP, mmHg

99 (93–111)

100 (94–111)

99 (93–111)

Hypertensive, n (%)

186 (42)

49 (46)

137 (41)

AHT use, n (%)

49 (11)

8 (8)

41 (12)

Previous stroke, n (%)

4 (1.2)

3 (3.3)

1 (0.4)

Diabetic, n (%)

35 (10)

7 (8)

28 (11)

Current smoker, n (%)

49 (15)

23 (25)

26 (11)

Alcohol use, n (%)

62 (18)

34 (37)

28 (11)

  1. All data shown as median (IQR, interquartile range) unless otherwise indicated. Smokers identified by self-report. Hypertensive categorised as BP ≥ 140/90 mmHg or current medication. BMI body mass index, MAP mean arterial pressure, AHT antihypertensive medication use within the last 2 weeks; alcohol use within the last month
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