Table 1. Sociodemographic data of participants in the DANPAIN-Biobank.
| Variables | Pain-free (n=70) | High impact chronic pain | Osteoarthritis pain | |||
|---|---|---|---|---|---|---|
| Number (n=201) | P value | Number (n=81) | P value | |||
| Age (years), mean ± SD [range] | 37.4±16.2 [18–77] | 45.4±11.5 [20–75] | <0.001 | 67.1±8.9 [44–79] | <0.001 | |
| Sex, female, n (%) | 43 (61.4) | 172 (85.6) | <0.001 | 46 (56.8) | 0.56 | |
| BMI (kg/m2), mean ± SD [range] | 25.7±4.6 [18–42] | 28.3±5.5 [17–48] | 0.001 | 28.4±5.7 [19–55] | 0.002 | |
| Civil status, cohabiting n (%) | 40 (57.1) | 129 (64.2) | 0.21 | 58 (71.6) | 0.05 | |
| Smoking, n (%) | 0.013 | 0.70 | ||||
| No | 50 (71.4) | 103 (51.2) | 56 (69.1) | |||
| Yes | 8 (11.4) | 44 (21.9) | 13 (16.0) | |||
| Previous smoking | 11 (15.7) | 50 (24.9) | 11 (13.6) | |||
| Alcohol consumption (units of alcohol per week), n (%) | 0.019 | 0.013 | ||||
| 0 | 30 (42.9) | 116 (57.7) | 15 (18.5) | |||
| 1–7 | 32 (45.7) | 74 (36.8) | 52 (64.2) | |||
| 8–14 | 5 (7.1) | 8 (4.0) | 7 (8.6) | |||
| ≥15 | 2 (2.9) | 0 | 5 (6.2) | |||
| Highest education, n (%) | <0.001 | <0.001 | ||||
| Primary school education | 5 (7.1) | 18 (9.0) | 19 (23.5) | |||
| Upper secondary education | 19 (27.1) | 19 (9.5) | 4 (4.9) | |||
| Vocational education/training | 6 (8.6) | 60 (29.9) | 22 (27.2) | |||
| Short cycle education | 5 (7.1) | 29 (14.4) | 11 (13.6) | |||
| Vocational bachelor education | 24 (34.3) | 53 (26.4) | 15 (18.5) | |||
| Master’s program | 10 (14.3) | 12 (6.0) | 3 (3.7) | |||
| Others | 1 (1.4) | 6 (3.0) | 5 (6.2) | |||
| Work situation, n (%) | <0.001 | <0.001 | ||||
| Normal working hours | 34 (48.6) | 28 (13.9) | 20 (24.7) | |||
| Reduced working hours | 0 | 41 (20.3) | 1 (1.2) | |||
| Sick leave (partly or fulltime) | 1 (1.4) | 44 (21.9) | 4 (4.9) | |||
| Pension | 5 (7.1) | 44 (21.9) | 45 (55.6) | |||
| Studying | 24 (34.3) | 13 (6.5) | 0 | |||
| Unemployed | 0 | 10 (5.0) | 2 (2.5) | |||
| Other | 6 (8.6) | 17 (8.5) | 8 (9.9) | |||
| Physical activity, n (%) | <0.001 | <0.001 | ||||
| Primarily sedentary pursuits | 10 (14.3) | 65 (32.3) | 16 (19.8) | |||
| Physical activity at least 4 hours per week | 27 (38.6) | 102 (50.7) | 48 (59.3) | |||
| Active sports activities/heavy work | 30 (42.9) | 21 (10.4) | 13 (16.0) | |||
| Competitive sports | 2 (2.9) | 1 (0.5) | 0 | |||
In categories where the number of participants is not equal to the total number of participants in the group, data are missing. P values represents differences compared to the pain-free group. DANPAIN, the Danish Pain Research Biobank; SD, standard deviation; BMI, body mass index.