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Table 2 Incidence of hypertension by baseline characteristics of participants

From: Incidence of hypertension in a prospective cohort study of adults from Porto, Portugal

 

Number of new cases

Incidence rate (95% CI) per 1000 person-years

Crude RR (95% CI)

Adjusted RRb (95% CI)

Education (years)

    

≤4

70

78.2 (61.8-99.6)

1

1

4–12

62

44.7 (34.0-59.8)

0.57 (0.40-0.82)

0.76 (0.52-1.01)

≥13

53

35.2 (26.5-47.8)

0.45 (0.31-0.66)

0.70 (0.46-1.08)

Marital status

    

Married/civil union

135

52.4 (43.6-63.2)

1

1

All others

50

37.5 (28.0-51.2)

0.72 (0.51-1.02)

0.83 (0.56-1.22)

Tobacco consumption

    

Current smoker

43

38.0 (27.6-53.7)

1

1

Ex-smoker

38

51.8 (37.1-73.6)

1.36 (0.85-2.18)

1.10 (0.67-1.79)

Never-smokers

104

53.4 (43.7-65.8)

1.40 (0.95-2.07)

 

Ethanol (g/day)

    

women: <15.0; men: <30.0

111

42.8 (35.2-52.4)

1

1

women: ≥15.0; men: ≥30.0

64

69.6 (53.8-91.1)

1.63 (1.17-2.26)

1.23 (0.86-1.76)

Physical activity a

    

1st third

56

43.5 (33.1-58.1)

1

1

2nd third

69

56.4 (43.8-73.6)

1.30 (0.89-1.90)

1.18 (0.80-1.72)

3rd third

59

44.8 (34.0-60.1)

1.03 (0.69-1.53)

1.05 (0.70-1.57)

Body mass index (Kg/m2)

    

<25

64

31.2 (24.0-41.1)

1

1

25–29.9

87

64.0 (51.3-80.6)

2.05 (1.45-2.91)

1.67 (1.17-2.39)

≥30

33

94.1 (65.2-138.9)

3.02 (1.91-4.76)

2.44 (1.50-3.98)

  1. 95% CI: 95% confidence interval.
  2. RR: relative risk.
  3. a The tertiles of the sample distribution of physical activity were 1.41, 1.58 and 3.46 MET*hour/day among women and 1.38, 1.61 and 3.26 MET*hour/day among men;
  4. b Adjusted for sex, age, education and an interaction term of age with sex.