Table 1 Demographic and clinical characteristics of the sample population
Total (n = 5,055) | Chronic pain patients (n = 721) | Non-chronic pain patients (n = 4334) | P-values for significance tests | |
|---|---|---|---|---|
Age: mean (SD) | 69 (9) | 67 (10) | 69 (9) | < 0.001a |
Female: n (%) | 2849 (56%) | 420 (58%) | 2429 (56%) | 0.286b |
BMI: mean (SD) | 31 (5) | 32 (6) | 30 (5) | < 0.001a |
Exposure time (years) | 4 (3) | 4 (3) | 4 (3) | 0.003c |
Current smoker: n (%) | 302 (6%) | 97 (14%) | 205 (5%) | < 0.001b |
Current drinker: n (%) | 2528 (79%) | 331 (72%) | 2197 (80%) | < 0.001b |
Charlson Comorbidity: n (%) (5 years prior) | ||||
None | 3570 (71%) | 472 (65%) | 3098 (71%) | < 0.001b |
1 | 423 (8%) | 61 (8%) | 362 (8%) | |
2 | 614 (12%) | 99 (14%) | 515 (12%) | |
3+ | 448 (9%) | 89 (12%) | 359 (8%) | |
Charlson Comorbidity: n (%) (1 year prior) | ||||
None | 4619 (91%) | 644 (89%) | 3975 (92%) | 0.096b |
1 | 209 (4%) | 34 (5%) | 175 (4%) | |
2 | 186 (4%) | 33 (5%) | 153 (4%) | |
3+ | 41 (1%) | 10 (1%) | 31 (1%) | |
IMD deprivation score: n (%) (quintiles; least to most deprived) | ||||
1 | 1233 (24%) | 119 (17%) | 1114 (26%) | < 0.001b |
2 | 1313 (26%) | 162 (22%) | 1151 (27%) | |
3 | 1136 (22%) | 168 (23%) | 968 (22%) | |
4 | 844 (17%) | 140 (19%) | 704 (16%) | |
5 | 523 (10%) | 131 (18%) | 392 (9%) |