Table 4 Incidence of hypertension and drinking frequency during the observational period in 6077 women

From: Body mass index modifies the association between frequency of alcohol consumption and incidence of hypertension in men but not in women: a retrospective cohort study

 

Drinking frequency (days/week)

P

Rarely

1–3

4–6

7

Observational period (years)

4.7 (2.1–7.9)

4.3 (2.1–8.0)

5.0 (2.4–8.0)

5.2 (2.7–9.1)

0.011

Incidence of hypertension (N [%])

233 (6.0)

82 (5.2)

24 (8.5)

45 (13.5)

<0.001

Incidence rate per 1000 PY (95% CI)

11 (10–13)

10 (8–12)

15 (10–23)

22 (16–30)

 

Drinking frequency during the observational period

Number at risk at 2 years

2994 (77.3)

1219 (76.6)

227 (80.8)

277 (83.2)

0.033

 Drinking frequency, availablea,b (N [%])

1983 (66.2)

804 (66.0)

136 (59.9)

177 (63.9)

0.242

  Rarely (N [%])

1749 (88.2)

263 (32.7)

14 (10.3)

12 (6.8)

 

  1–3 days

210 (10.6)

449 (55.8)

42 (30.9)

17 (9.6)

 

  4–6 days

10 (0.5)

71 (8.8)

55 (40.4)

27 (15.3)

 

  7 days

14 (0.7)

21 (2.6)

25 (18.4)

121 (68.4)

 

Number at risk at 4 years

2163 (55.9)

847 (53.2)

166 (59.1)

215 (64.6)

0.001

 Drinking frequency, availablea,b (N [%])

1084 (50.1)

404 (47.7)

78 (47.0)

110 (51.2)

0.556

  Rarely

933 (86.1)

129 (31.9)

11 (14.1)

9 (8.2)

 

  1–3 days

132 (12.2)

212 (52.5)

31 (39.7)

15 (13.6)

 

  4–6 days

16 (1.5)

49 (12.1)

24 (30.8)

22 (20.0)

 

  7 days

3 (0.3)

14 (3.5)

12 (15.4)

64 (58.2)

 

Number at risk at 6 years

1419 (36.7)

613 (38.5)

112 (39.9)

147 (44.1)

0.034

 Drinking frequency, availablea,b (N [%])

530 (37.4)

218 (35.6)

38 (33.9)

65 (44.2)

0.228

  Rarely

440 (83.0)

59 (27.1)

5 (13.2)

6 (9.2)

 

  1–3 days

76 (14.3)

115 (52.8)

14 (36.8)

3 (4.6)

 

  4–6 days

9 (1.7)

28 (12.8)

11 (28.9)

10 (15.4)

 

  7 days

5 (0.9)

16 (7.3)

8 (21.1)

46 (70.8)

 
  1. The data are represented as median (interquartile range)
  2. CI confidence interval, PY person-year
  3. aThe data of drinking frequency were missing after March 2013, because a question of drinking frequency was changed thereafter
  4. bReproducibility of the baseline drinking frequency at 2, 4, and 6 years after the baseline visit were 0.74, 0.71, and 0.70 of weighted kappa statistics, respectively