Table 1. General characteristics, N = 3110.
| Total | Underweight | Normal weight | Overweight | Mild obesity | Severe obesity | P-values | |
|---|---|---|---|---|---|---|---|
| BMI, Mean±SD | 27.1±5.4 | 17.7±0.9 | 22.4±1.7 | 27.4±1.4 | 32.0±1.4 | 39.3±4.1 | - |
| BMI category, n (%) | 3110 | 46 (1.5%) | 1166 (37.5) | 1113 (35.8) | 543 (17.5) | 242 (7.8) | - |
| Socio-demographic factors | |||||||
| Women, n (%) | 2327 (74.8) | 40 (87.0) | 936 (80.3) | 756 (67.9) | 392 (72.2) | 203 (83.9) | <0.001 |
| Age, years, Mean±SD | 44.5±12.2 | 36.5±13.5 | 42.2±12.9 | 45.5±11.8 | 47.2±11.2 | 46.7±9.9 | <0.001 |
| Born outside Europe, n (%) | 406 (13.1) | 5 (10.9) | 114 (9.8) | 180 (16.2) | 82 (15.1) | 25 (10.3) | <0.001 |
| University/college, n (%) | 835 (27.3) | 12 (26.1) | 393 (33.7) | 270 (24.3) | 126 (23.2) | 46 (19) | <0.001 |
| Work/study, n (%) | 1592 (51.2) | 28 (60.9) | 630 (54.0) | 575 (51.7) | 249 (45.9) | 110 (45.5) | 0.005 |
| Pain aspects 1 | |||||||
| Pain intensity (NRS-7days), Mean±SD | 6.9±1.9 | 7.4±1.2 | 6.6±1.9 | 7.1±1.7 | 7.1±1.8 | 7.4±1.5 | <0.001 ab, bd, be |
| Pain distribution (PRI), Mean±SD | 15±9 | 18±9 | 14±8 | 14±8 | 16±9 | 18±9 | <0.001 ab, bd, be |
| Pain-duration, months, median (q1-q3) | 160 (66–405) | 167 (66–370) | 124 (59–335) | 167 (67–400) | 207 (75–500) | 200 (93–492) | <0.001 ab, bd, be |
| Presence of constant pain, n (%) | 2482 (79.8) | 37 (80.4) | 861 (73.8) | 913 (82.0) | 462 (85.1) | 209 (86.4) | <0.001 |
| Psychological aspects 2 | |||||||
| HADS-A, Mean±SD | 9.4±4.7 | 10.1±5.5 | 9.5±4.7 | 9.2±4.7 | 9.4±4.7 | 9.3±4.9 | NS |
| HADS-D, Mean±SD | 9.1±4.5 | 9.3±4.3 | 8.9±4.6 | 9.0±4.5 | 9.6±4.4 | 9.7±4.4 | 0.016 bd |
| Insomnia index, Mean±SD | 16.7±6.6 | 16.5±6.4 | 15.6±6.7 | 17.0±6.6 | 17.4±6.5 | 18.5±6.3 | <0.001 bd, bc, be |
| RAND-36 MCS, Mean±SD | 41.0±21.4 | 37.3±20.5 | 41.5±21.5 | 41.3±21.9 | 39.5±20.4 | 40.3±21.5 | NS |
| MPI-affective distress, Mean±SD | 3.5±1.3 | 3.6±1.4 | 3.5±1.3 | 3.5±1.3 | 3.5±1.3 | 3.5±1.4 | NS |
| MPI-lifecon, Mean±SD | 2.7±1.2 | 2.5±1.1 | 2.7±1.2 | 2.8±1.2 | 2.6±1.2 | 2.6±1.2 | NS |
| Physical activity (PA) 3 | |||||||
| PA time /week, minutes, Median (q1-q3) | 150 (75–300) | 150 (75–300) | 210 (75–315) | 165 (75–300) | 120 (45–225) | 120 (45–225) | <0.001 bd, bc, be |
| 1st quartile (0-75min), n (%) | 957 (32) | 12 (27.9) | 308 (27.2) | 331 (31.1) | 206 (40.0) | 100 (42.2) | <0.001 |
| 2nd quartile (>75-150min), n (%) | 543 (18.1) | 10 (23.3) | 182 (16.1) | 195 (18.3) | 102 (19.8) | 54 (22.8) | -- |
| 3rd quartile (>150-300min), n (%) | 844 (28.2) | 14 (32.6) | 330 (29.2) | 328 (30.8) | 120 (23.3) | 52 (21.9) | -- |
| 4th quartile (>300 min), n (%) | 649 (21.7) | 7 (16.3) | 312 (27.6) | 212 (19.9) | 87 (16.9) | 31 (13.1) | -- |
| Insufficient PA, n (%) | 1396 (47.3) | 18 (41.9) | 460 (40.6) | 498 (46.7) | 296 (57.5) | 142 (59.9) | <0.001 |
Chi-square, one-way ANOVA (Post-hoc test with Bonferroni) or Kruskal–Wallis test (Mann-Whitney U test with Bonferroni method for post hoc test).
a: underweight group = 366
b: normal weight group
c: overweight group
d: mild obesity group
e: severe obesity group
Missing data: 1 = 366, 2 = 537, 3 = 117. NS: not significant.