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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