Table 1 Characteristics of study participants (Japanese male bus drivers) by alcohol consumption and respiratory disturbance index (RDI)

From: Association of sleep-disordered breathing and alcohol consumption with hypertension among Japanese male bus drivers

 

Alcohol consumption (g/day/kg body weight)

RDI (events/h)

Nondrinkers (n = 961)

<0.5 (n = 832)

0.5 to <1.0 (n = 483)

≥1.0 (n = 249)

p for trend

<10 (n = 943)

10 to <20 (n = 885)

≥20 (n = 697)

p for trend

Age [years]

47.1 (9.0)

48.1 (8.4)

49.9 (8.3)

48.7 (8.0)

<0.01

46.3 (8.7)

48.7 (8.7)

49.8 (7.9)

<0.01

RDI [events/h]

11.8

12.9

13.4

14.2

<0.01

6.4

13.8

27.3

<0.01

BMI [kg/m2]

25.5 (4.5)

25.1 (3.8)

24.3 (3.3)

24.4 (3.2)

<0.01

24.1 (3.6)

25.0 (3.7)

26.3 (4.4)

<0.01

Current smokers, n (%)

417 (43.4)

368 (44.2)

253 (52.4)

130 (52.2)

<0.01

453 (48.1)

410 (46.4)

305 (44.0)

0.09

Alcohol consumption [g/day/kg]

0.0 (0.0)

0.3 (0.1)

0.7 (0.1)

2.1 (1.4)

<0.01

0.4 (0.6)

0.5 (0.9)

0.5 (0.7)

0.02

Hypertension, n (%)

350 (36.4)

352 (42.3)

234 (48.4)

121 (48.6)

<0.01

321 (34.0)

385 (43.5)

351 (50.4)

<0.01

Systolic blood pressure [mmHg]

126 (13.2)

128 (12.1)

129 (13.0)

131 (13.9)

<0.01

126 (12.6)

129 (13.2)

130 (12.7)

<0.01

Diastolic blood pressure [mmHg]

79.7 (10.9)

81.1 (9.9)

82.0 (10.8)

82.2 (9.4)

<0.01

79.6 (10.4)

80.9 (9.9)

82.6 (10.9)

<0.01

  1. Values are mean (standard deviation) for continuous variables, except for RDI (median values), and number of participants (%) for categorical variables
  2. Hypertension is defined as systolic blood pressure ≥140 mmHg or diastolic blood pressure ≥90 mmHg or use of antihypertensive medications
  3. BMI Body mass index, RDI respiratory disturbance index
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