Table 1 Baseline characteristics of participants

Age ^a (years)

All

< 39

40–59

60–86

1095 (39.89 ± 17.82)

559 (24.7 ± 6.49)

347 (49.2 ± 5.66)

189 (67.7 ± 6.13)

323 (38.59 ± 19.39)

184 (23.54 ± 5.68)

77 (49.84 ± 5.77)

62 (69.24 ± 7.03)

772 (40.73 ± 17.11)

375 (25.24 ± 6.79)

270 (49.05 ± 5.63)

127 (66.97 ± 5.51)

< 0.001

< 0.001

Education ^b

Secondary school

High school

Junior college /Technical school

University

Missing

8 (0.7%)

522 (47.7%)

447 (40.8%)

60 (5.5%)

58 (5.3)

0 (0%)

164 (54.8%)

108 (36.1%)

27 (9.0%)

24 (7.4%)

8 (1.1%)

358 (48.5%)

339 (45.9%)

33(4.5%)

34 (4.4%)

0.001

Employment ^b

Unemployed

Student

Homeworker

Part-time worker

Full-time worker

Missing

75 (6.8%)

363 (33.2%))

109 (10.0%)

80 (7.3%)

453 (41.4%)

15 (1.4%)

33 (10.4%)

145 (44.9%)

3 (0.9%)

2 (0.6)

134 (41.5%)

6 (1.9%)

42 (5.4%)

218 (28.2%)

106 (13.7%)

78 (10.1%)

319 (41.3%)

9 (1.2%)

< 0.001