Table 1

Characteristics of the participants in this study (N=7251)

N (%)Mean (SD)
Sex
 Male4574 (63.1)
 Female2677 (36.9)
Age, years44.3 (10.6)
 Marital status
 Unmarried1838 (25.4)
 Married5134 (70.8)
 Divorced226 (3.1)
 Bereaved53 (0.7)
Employment status
 Full time5702 (78.6)
 Part-time1378 (19.0)
 Temporary staff171 (2.4)
Type of organisation
 Public official810 (11.2)
 Incorporated administrative agency3065 (42.3)
 Private company1306 (18.0)
 Others2070 (28.5)
Type of job
 Researcher/academic2980 (41.1)
 Clerk/administration2539 (35.0)
 Technician/engineer1614 (22.2)
 Other118 (1.6)
Position
 Manager1529 (21.1)
 Non-managerial5722 (78.9)
Living with family members
 Yes5549 (76.5)
 No1702 (23.5)
Exercise habit
 Three times or more per week1259 (17.4)
 One to two times per week2146 (29.6)
 Less than once per week3846 (53.0)
Smoking status
 Smoker782 (10.8)
 Non-smoker6469 (89.2)
Household income, JPY
 <2 million199 (2.7)
 2–4 million957 (13.2)
 4–6 million1221 (16.8)
 6–8 million1392 (19.2)
 8–10 million1398 (19.3)
 10–12 million1007 (13.9)
 12–14 million500 (6.9)
 >14 million577 (8.0)
K6 Score5.6 (5.1)
 Male5.3 (5.0)
 Female6.0 (5.1)
 <5 points3691 (50.9)
 ≥5 points3560 (49.1)
 <13 points6530 (90.1)
 ≥13 points721 (9.9)
  • K6, Kessler Screening Scale for Psychological Distress.