Appendix A.
Demographic and occupational characteristics and lifestyle behaviors of participants at baseline by change in job demands
| Change in job demands | Stable low (n=735) | Increased (n=165) | Decreased (n=337) | Stable high (n=578) | p | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean (SD) | n (%) | Mean (SD) | n (%) | Mean (SD) | n (%) | Mean (SD) | n (%) | |||||
| Age | 52.11 (7.42) | 47.91 (7.28) | 51.60 (7.28) | 47.47 (7.27) | <0.001/<0.001a | |||||||
| 35-39 years old | 57 (7.8) | 30 (18.2) | 23 (6.8) | 105 (18.2) | ||||||||
| 40-49 years old | 176 (23.9) | 53 (32.1) | 95 (28.2) | 214 (37.0) | ||||||||
| 50-59 years old | 416 (55.6) | 80 (48.5) | 199 (59.1) | 247 (42.7) | ||||||||
| 60 years old or more | 86 (11.7) | 2 (1.2) | 20 (2.1) | 12 (2.1) | ||||||||
| Marital status | 0.094 | |||||||||||
| Currently married | 634 (86.3) | 141 (85.5) | 300 (89.0) | 506 (87.5) | ||||||||
| Never married | 72 (9.8) | 21 (12.7) | 31 (9.2) | 63 (10.9) | ||||||||
| Divorced/widowed | 29 (3.9) | 3 (1.8) | 6 (1.8) | 9 (1.6) | ||||||||
| Department | 0.003 | |||||||||||
| Design engineering department | 175 (23.8) | 56 (33.9) | 103 (30.6) | 204 (35.3) | ||||||||
| Inspection department | 79 (10.7) | 16 (9.7) | 44 (13.1) | 58 (10.0) | ||||||||
| Production assembling department | 149 (20.3) | 35 (21.2) | 60 (17.8) | 102 (17.6) | ||||||||
| Production control department | 58 (7.9) | 8 (4.8) | 31 (9.2) | 47 (8.1) | ||||||||
| Transportation department | 11 (1.5) | 1 (0.6) | 3 (0.9) | 2 (0.3) | ||||||||
| General affairs department | 127 (17.3) | 33 (20.0) | 46 (13.6) | 73 (12.6) | ||||||||
| Sales department | 31 (4.2) | 1 (0.6) | 7 (2.1) | 12 (2.1) | ||||||||
| Data input department | 1 (0.1) | 0 (0) | 2 (0.6) | 1 (0.2) | ||||||||
| Research department | 35 (4.8) | 5 (3.0) | 12 (3.6) | 33 (5.7) | ||||||||
| Medical department | 0 (0) | 0 (0) | 1 (0.3) | 3 (0.5) | ||||||||
| Service department | 6 (0.8) | 1 (0.6) | 4 (1.2) | 2 (0.3) | ||||||||
| Others | 63 (8.6) | 9 (5.5) | 24 (7.1) | 41 (7.1) | ||||||||
| Employment position and occupation | <0.001 | |||||||||||
| Manager | 286 (38.9) | 59 (35.8) | 164 (48.7) | 258 (44.6) | ||||||||
| Main career track | 186 (15.3) | 68 (41.2) | 94 (27.9) | 204 (35.3) | ||||||||
| General clerk | 60 (8.2) | 5 (3.0) | 19 (5.6) | 23 (4.0) | ||||||||
| Non-clerical workers | 179 (24.4) | 32 (19.4) | 58 (17.2) | 91 (15.7) | ||||||||
| Others | 24 (3.3) | 1 (0.6) | 2 (0.3) | 2 (0.3) | ||||||||
| Smoking history | 0.763 | |||||||||||
| Non smoker | 464 (63.1) | 105 (63.6) | 205 (60.8) | 372 (64.4) | ||||||||
| Current smoker | 271 (36.9) | 60 (36.4) | 132 (39.2) | 206 (35.6) | ||||||||
| Alcohol consumption [g/wk] | 133.42 (124.57) | 127.56 (130.44) | 129.98 (119.86) | 115.32 (115.28) | 0.056/0.110a | |||||||
| 0-44 | 258 (35.1) | 64 (38.8) | 116 (34.4) | 225 (38.9) | ||||||||
| 45-154 | 210 (28.6) | 49 (29.7) | 106 (31.5) | 189 (32.7) | ||||||||
| 155 or more | 267 (36.3) | 52 (31.5) | 115 (34.1) | 164 (28.4) | ||||||||
| Exercise habits | 0.035 | |||||||||||
| Yes | 324 (44.1) | 71 (43.0) | 133 (39.5) | 210 (36.3) | ||||||||
| No | 411 (55.9) | 94 (57.0) | 204 (60.5) | 368 (63.7) | ||||||||
| Sleeping hours | <0.001 | |||||||||||
| <5 hours | 21 (2.9) | 8 (4.8) | 24 (7.1) | 51 (8.8) | ||||||||
| ≥5 hours to <6 hours | 268 (36.5) | 77 (46.7) | 161 (47.8) | 302 (52.2) | ||||||||
| ≥6 hours to <7 hours | 351 (47.8) | 64 (38.8) | 126 (37.4) | 199 (34.4) | ||||||||
| ≥7 hours | 95 (12.9) | 16 (9.7) | 26 (7.7) | 26 (4.5) | ||||||||
| Body mass index [kg/m2] | 23.58 (2.53) | 23.44 (2.61) | 23.79 (2.56) | 23.79 (2.50) | 0.239/0.573a | |||||||
| Low (22.5 or less) | 254 (34.6) | 66 (40.0) | 105 (31.2) | 186 (32.2) | ||||||||
| Middle (22.6-24.6) | 247 (33.6) | 50 (30.3) | 118 (35.0) | 200 (34.6) | ||||||||
| High (24.7 or more) | 234 (31.8) | 49 (29.7) | 114 (33.8) | 192 (33.2) | ||||||||
| a p values for continuous variables are shown in left side; p values for categorical variables are shown in right side | ||||||||||||