Table 2 Frequencies (percentages) of background factors and of health behaviours in the cohort specified for those later granted DP due to MSD, DP in general, and had no DP during follow up
| Â | DP due to MSD | DP in general | No DP | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Â | Men | Women | Men | Women | Men | Women | ||||||
| Â | MZ | DZ | MZ | DZ | MZ | DZ | MZ | DZ | MZ | DZ | MZ | DZ |
Background factors | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) |
Employment at 1970 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   ≥ 35 hours | 87 (84) | 114 (79) | 79 (41) | 111 (36) | 204 (77) | 296 (75) | 181 (38) | 262 (37) | 1646 (56) | 2563 (57) | 1062 (34) | 1448 (33) |
   20-34 hours | 1 (1) | - | 17 (9) | 37 (12) | 3 (1) | - | 40 (8) | 61 (9) | 23 (1) | 26 (1) | 172 (6) | 267 (6) |
   1-19 hours | - | - | 3 (2) | 11 (4) | 2 (1) | 1 (0) | 17 (4) | 25 (4) | 18 (1) | 12 (0) | 97 (3) | 129 (3) |
   Student | 13 (13) | 22 (15) | 33 (17) | 53 (17) | 38 (14) | 72 (18) | 115 (24) | 147 (21) | 1060 (36) | 1664 (37) | 1136 (37) | 1506 (35) |
   Conscript in army | 2 (2) | 5 (3) | - | - | 7 (3) | 12 (3) | - | - | 121 (4) | 158 (4) | - | - |
   Other (not in paid work) | - | 2 (1) | 59 (31) | 91 (30) | 5 (2) | 5 (1) | 123 (26) | 198 (28) | 10 (0) | 24 (1) | 605 (20) | 966 (22) |
   Missing data | - | 2 (1) | 2 (1) | 1 (0) | 4 (2) | 8 (2) | 3 (1) | 10 (1) | 35 (1) | 49 (1) | 22 (1) | 30 (1) |
Marital status | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Married or living with someone | 90 (87) | 120 (83) | 145 (75) | 232 (76) | 213 (80) | 306 (78) | 339 (71) | 510 (72) | 2366 (81) | 3696 (82) | 2379 (77) | 3366 (77) |
   Single, separated, widowed | 14 (14) | 25 (17) | 48 (25) | 73 (24) | 52 (20) | 88 (22) | 140 (29) | 193 (23) | 551 (19) | 803 (18) | 723 (23) | 981 (23) |
Number and severity of diseases | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
- None | 1 (1) | 2 (1) | 1 (1) | 1 (0) | 2 (1) | 12 (3) | 1 (0) | 1 (0) | 162 (6) | 247 (6) | 105 (3) | 160 (4) |
- One or more not life-threatening | 42 (40) | 47 (32) | 38 (20) | 86 (28) | 69 (26) | 96 (24) | 85 (18) | 169 (24) | 966 (33) | 1637 (36) | 999 (32) | 1471 (34) |
One or more somewhat life-threatening | 2 (2) | 2 (1) | 1 (1) | 5 (2) | 4 (2) | 13 (3) | 6 (1) | 11 (2) | 127 (4) | 218 (5) | 109 (4) | 137 (3) |
One or more not and somewhat life-threatening | 57 (55) | 92 (63) | 135 (70) | 192 (63) | 180 (68) | 261 (66) | 336 (70) | 458 (65) | 1562 (54) | 2278 (51) | 1657 (53) | 2291 (53) |
One or more very life-threatening | - | - | - | - | - | - | 1 (0) | - | 6 (0) | 3 (0) | 14 (1) | 15 (0) |
Two or more not and very life-threatening | - | - | 2 (1) | 7 (2) | 1 (0) | 2 (1) | 7 (2) | 12 (2) | 26 (1) | 33 (1) | 63 (2) | 101 (2) |
Two or more somewhat and very life-threatening | - | - | - | 1 (0) | - | - | 1 (0) | 3 (0) | 3 (0) | 8 (0) | 9 (0) | 8 (0) |
Three or more not, somewhat and very life-threatening | 2 (2) | 2 (1) | 16 (8) | 13 (4) | 9 (3) | 11 (3) | 42 (9) | 49 (7) | 65 (2) | 73 (2) | 145 (5) | 164 (4) |
Health behaviour | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Leisure-time physical activity | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Stable frequent exerciser | 27 (26) | 32 (22) | 41 (21) | 87 (29) | 60 (23) | 92 (23) | 129 (27) | 182 (26) | 745 (26) | 1162 (26) | 1006 (32) | 1334 (31) |
   Stable sedentary | 19 (18) | 34 (23) | 51 (26) | 70 (23) | 51 (19) | 93 (24) | 112 (23) | 181 (26) | 598 (21) | 857 (19) | 646 (21) | 955 (22) |
Decreased the frequency of exercise | 28 (27) | 35 (24) | 48 (25) | 64 (21) | 75 (28) | 106 (27) | 112 (23) | 152 (22) | 754 (26) | 1243 (28) | 643 (21) | 927 (21) |
Increased the frequency of exercise | 8 (8) | 13 (9) | 25 (13) | 46 (15) | 22 (8) | 27 (7) | 63 (13) | 96 (14) | 244 (8) | 395 (9) | 476 (15) | 683 (16) |
BMI | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Stable | 43 (41) | 51 (35) | 85 (44) | 124 (41) | 106 (40) | 146 (37) | 226 (47) | 292 (42) | 1139 (39) | 1893 (42) | 1462 (47) | 2126 (49) |
   Decreased | - | 1 (1) | 1 (1) | 2 (1) | 4 (2) | 6 (2) | 5 (1) | 12 (2) | 21 (1) | 39 (1) | 19 (1) | 49 (1) |
   Increased | 46 (44) | 72 (50) | 78 (40) | 137 (45) | 113 (43) | 185 (47) | 188 (39) | 300 (43) | 1388 (48) | 2016 (45) | 1324 (43) | 1692 (39) |
Pain locations | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Never any pain | 16 (15) | 16 (11) | 23 (12) | 53 (17) | 50 (20) | 92 (23) | 105 (22) | 153 (22) | 1136 (39) | 1666 (37) | 1291 (42) | 1818 (42) |
   Stable number of pain locations | 6 (6) | 11 (8) | 10 (5) | 12 (4) | 23 (9) | 23 (6) | 16 (3) | 22 (3) | 120 (4) | 206 (5) | 85 (3) | 129 (3) |
   Decrease of pain locations | 3 (3) | 6 (4) | 6 (3) | 10 (3) | 12 (5) | 20 (5) | 9 (2) | 27 (4) | 105 (4) | 188 (4) | 89 (3) | 153 (4) |
   Increase of pain locations | 66 (64) | 88 (61) | 127 (66) | 196 (64) | 142 (54) | 196 (50) | 291 (61) | 409 (58) | 1197 (41) | 1884 (42) | 1373 (44) | 1828 (42) |
Change of use of tobacco products | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Stable never user | 9 (9) | 9 (6) | 26 (14) | 50 (16) | 24 (9) | 35 (9) | 76 (16) | 109 (16) | 367 (13) | 441 (10) | 677 (22) | 880 (20) |
Changed the use (increased or decreased) | 19 (18) | 21 (15) | 40 (21) | 56 (18) | 41 (16) | 69 (18) | 91 (19) | 131 (19) | 795 (27) | 1181 (26) | 858 (28) | 1057 (24) |
   Stable tobacco user | 58 (56) | 88 (61) | 89 (46) | 150 (49) | 155 (59) | 224 (57) | 238 (50) | 346 (49) | 1390 (48) | 2295 (51) | 1245 (40) | 1904 (44) |
Alcohol consumption | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   Abstainer | 5 (5) | 2 (1) | 6 (3) | 12 (4) | 6 (2) | 5 (1) | 15 (3) | 25 (4) | 63 (2) | 90 (2) | 102 (3) | 188 (4) |
   Sometimes or regularly | 99 (95) | 143 (99) | 187 (97) | 293 (96) | 259 (98) | 390 (99) | 464 (97) | 678 (96) | 2854 (98) | 4409 (98) | 2999 (97) | 4160 (96) |