Table 1.
Study population
| Cases | Referents | ||||||
| Mean or % | SD | Mean or % | SD | p | OR | 95%CI | |
| N | 138 | 401 | |||||
| Age, years | 49.5 | 8.79 | 48.8 | 8.25 | n.s. | 0.97 | 0.93-0.997 |
| Marital status, % | n.s. | ||||||
| Single | 7.4 | 9.3 | |||||
| Married or cohabiting | 71.1 | 73.4 | |||||
| Divorced | 18.5 | 15.0 | |||||
| Widowed | 3.0 | 2.3 | |||||
| No. of children | 2.4 | 1.16 | 2.2 | 1.28 | n.s. | ||
| Migrant status, % | |||||||
| 1st generation immigrant | 20.3 | 9.7 | < 0.001 | 2.39 | 1.40-4.06 | ||
| 2nd generation immigrant | 2.9 | 4.0 | n.s. | ||||
| Education, % | < 0.001 | 0.80 | 0.65-0.98 | ||||
| Secondary school only | 22.0 | 8.8 | |||||
| Vocational training | 17.7 | 16.5 | |||||
| High school | 31.6 | 23.3 | |||||
| College or university | 28.7 | 51.4 | |||||
| Occupational status, % | < 0.001 | 3.58 | 2.63-4.86 | ||||
| Working full time | 10.3 | 52.1 | |||||
| Working part time | 15.4 | 26.4 | |||||
| Unemployed, on sick-leave or retired | 74.3 | 19.4 | |||||
| Other | - | 2.1 | |||||
| Income level (SEK/year), % | < 0.001 | 0.90 | 0.75-1.08 | ||||
| < 100.000 | 16.1 | 5.2 | |||||
| 100,000-149,000 | 19.7 | 8.3 | |||||
| 150,000-199,000 | 12.2 | 11.6 | |||||
| 200,000-299,000 | 19.9 | 28.7 | |||||
| > 300.000 | 32.1 | 46.2 | |||||
| Pain duration, years | 16.0 | 11.8 | - | - | |||
Characteristics of the study population.