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Table 2 Socio-demographic and life-style characteristics of the study sample (N = 1002)

From: Is adjustment for reporting heterogeneity necessary in sleep disorders? results from the Japanese World Health Survey

Characteristics

Value

Median age, years (range)

53 (18–91)

Female, no. (%)

576 (57.49)

Mean years of schooling, years (SD)

11.95 (2.66)

Number of morbidities, no. (%)

 

 None

689 (68.76)

 One

178 (17.76)

 Two

89 (8.88)

 Three or more

46 (4.59)

Having no regular exercise, no. (%)

582 (58.08)

Smoker, no. (%)

230 (22.95)

Alcohol consumer, no. (%)

865 (86.33)

  1. Note: SD standard deviation