Baseline characteristics | Men | Women | Internal missing* | ||||||||
All | None or one HB | Two HBs | Three HBs | Four HBs | All | None or one HB | Two HBs | Three HBs | Four HBs | (n) | |
N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | ||
5342 (42) | 1640 (31) | 2368 (44) | 1180 (22) | 154 (3) | 7298 (58) | 1590 (22) | 3001 (41) | 2009 (27) | 698 (10) | ||
Average age, years (SD) | 46 (15) | 45 (15) | 45 (16) | 47 (15) | 49 (15) | 44 (16) | 43 (16) | 44 (16) | 45 (15) | 44 (14) | 0 |
Body mass index | 210 | ||||||||||
Normal or low (<25) | 2523 (48) | 714 (44) | 1111 (47) | 612 (53) | 86 (56) | 4884 (68) | 1040 (67) | 1938 (66) | 1383 (70) | 523 (76) | |
Overweight (25–29.9) | 2196 (42) | 686 (43) | 977 (42) | 477 (41) | 56 (36) | 1675 (23) | 371 (24) | 700 (24) | 465 (23) | 139 (20) | |
Obese (≥30) | 550 (10) | 216 (13) | 250 (11) | 72 (6) | 12 (8) | 602 (9) | 140 (9) | 295 (10) | 140 (7) | 27 (4) | |
Socioeconomic status† | 1132 | ||||||||||
Unskilled/semiskilled worker | 791 (16) | 306 (21) | 322 (15) | 148 (14) | 15 (11) | 1057 (16) | 307 (21) | 458 (17) | 236 (13) | 56 (9) | |
Skilled worker | 744 (15) | 272 (18) | 317 (15) | 144 (13) | 11 (8) | 667 (10) | 184 (13) | 254 (10) | 179 (10) | 50 (8) | |
Low level non-manual employees | 431 (9) | 140 (9) | 203 (9) | 81 (7) | 7 (5) | 1302 (20) | 308 (22) | 538 (20) | 349 (19) | 107 (17) | |
Middle level non-manual employees | 1113 (23) | 327 (22) | 457 (21) | 287 (26) | 42 (30) | 1836 (28) | 321 (22) | 743 (28) | 563 (30) | 209 (32) | |
High level non-manual employees/self-employed | 1201 (24) | 249 (17) | 596 (27) | 309 (28) | 47 (33) | 1306 (20) | 214 (15) | 520 (19) | 399 (21) | 173 (27) | |
Self-employed (other than high level) | 618 (13) | 194 (13) | 279 (13) | 126 (12) | 19 (13) | 442 (6) | 101 (7) | 172 (6) | 122 (7) | 47 (7) | |
Financial stress‡ | 52 | ||||||||||
No | 4449 (83) | 1264 (78) | 2006 (85) | 1035 (88) | 144 (94) | 5917 (81) | 1144 (73) | 2441 (82) | 1710 (86) | 622 (89) | |
Occasional | 404 (8) | 147 (9) | 175 (7) | 74 (6) | 8 (5) | 617 (9) | 180 (11) | 263 (9) | 142 (7) | 32 (5) | |
Frequent | 472 (9) | 220 (13) | 180 (8) | 70 (6) | 2 (1) | 729 (10) | 256 (16) | 283 (9) | 147 (7) | 43 (6) | |
Living alone (Yes) | 959 (18) | 374 (23) | 390 (17) | 180 (15) | 15 (10) | 1312 (18) | 337 (21) | 546 (18) | 317 (16) | 112 (16) | 38 |
Personal support (Yes) | 4588 (87) | 1379 (85) | 2036 (87) | 1027 (88) | 146 (95) | 6706 (92) | 1448 (92) | 2744 (92) | 1851 (93) | 663 (95) | 86 |
Practical support (Yes) | 4876 (92) | 1458 (91) | 2160 (92) | 1084 (93) | 147 (97) | 6826 (94) | 1477 (93) | 2793 (94) | 1894 (95) | 662 (95) | 94 |
Long-term illness (Yes) | 1434 (27) | 446 (27) | 643 (27) | 306 (26) | 42 (27) | 1866 (26) | 440 (28) | 786 (27) | 470 (24) | 170 (25) | 172 |
Low back pain | 28 | ||||||||||
No | 1863 (35) | 524 (32) | 840 (35) | 433 (37) | 66 (43) | 2628 (36) | 509 (32) | 1030 (34) | 809 (40) | 280 (40) | |
Yes, a couple of days per month or more seldom | 2996 (56) | 960 (59) | 1300 (55) | 661 (56) | 75 (49) | 3935 (54) | 907 (57) | 1650 (55) | 1010 (51) | 368 (53) | |
Yes, a couple of days per week or more often | 474 (9) | 153 (9) | 226 (10) | 83 (7) | 12 (8) | 716 (10) | 172 (11) | 311 (11) | 183 (9) | 50 (7) | |
Headache/migraine (Yes) | 1077 (21) | 328 (21) | 514 (23) | 215 (19) | 20 (14) | 2499 (35) | 564 (37) | 1070 (37) | 638 (33) | 227 (33) | 449 |
Rheumatoid arthritis (Yes) | 94 (2) | 26 (2) | 43 (2) | 20 (2) | 5 (3) | 137 (2) | 38 (2) | 55 (2) | 32 (2) | 11 (2) | 85 |
Sleep disturbances§ (Yes) | 1684 (32) | 530 (33) | 758 (32) | 357 (30) | 39 (25) | 1713 (24) | 383 (24) | 732 (25) | 449 (23) | 149 (21) | 102 |
Psychological distress¶ (Yes) | 791 (15) | 287 (18) | 351 (15) | 141 (12) | 12 (8) | 1499 (21) | 394 (25) | 641 (22) | 350 (18) | 114 (16) | 125 |
Working hours** | 525 | ||||||||||
More than 45 | 699 (28) | 214 (29) | 300 (27) | 160 (27) | 25 (30) | 462 (12) | 93 (12) | 192 (13) | 125 (11) | 52 (12) | |
36 to 45 | 1581 (63 | 456 (63) | 702 (63) | 371 (64) | 52 (63) | 2356 (62) | 460 (61) | 968 (63) | 677 (61) | 251 (61) | |
Less than 36 | 228 (9) | 58 (8) | 110 (10) | 54 (9) | 6 (7) | 984 (26) | 200 (27) | 374 (24) | 300 (27) | 110 (27) | |
Physical workload** | 484 | ||||||||||
Sedentary work | 1067 (43) | 266 (37) | 497 (45) | 259 (44) | 45 (54) | 1625 (42) | 285 (38) | 669 (43) | 491 (44) | 180 (43) | |
Light, but somewhat mobile work | 675 (27) | 206 (28) | 286 (26) | 161 (27) | 22 (26) | 1138 (30) | 222 (29) | 470 (31) | 307 (28) | 139 (33) | |
Moderately heavy or heavy work | 762 (30) | 254 (35) | 167 (29) | 167 (29) | 17 (20) | 1077 (28) | 252 (33) | 406 (26) | 317 (28) | 102 (24) |
*Missing answer in the baseline questionnaire, number represent missing in the total study population.
†Socioeconomic status (SES), for the economically active population SES was based on current occupation and education, for the non-active population SES was based on previous occupation, current education or the occupation of spouses.
‡Financial stress, had been forced to borrow money from relatives and friends in order to buy groceries or pay the rent in the past 12 months.
§Hours of sleep a typical night during the workweek (<7 hours was considered as having sleep disturbances).
¶From the 12-item General Health Questionnaire were a sum score ≥3 was used to asses psychological stress.
**Only data from the ‘working population’ (participants 61 years old or younger, and currently employed, self-employed or job-applicants at baseline in 2006).