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Baseline Patient Characteristics
| Age (years)a | 46.8(mean) | 16.8 (S.D.) | |
| Employmentb | Full Time | 630 | 58.50% |
| Part Time | 77 | 5.90% | |
| Retired | 180 | 13.90% | |
| Disabled | 75 | 5.8% | |
| Not Employed | 223 | 17.2% | |
| Unknown | 10 | 0.8% | |
| Sexb | Female | 690 | 53.1% |
| Male | 609 | 46.9% | |
| Smokingb | Yes | 227 | 17.5% |
| Quit | 212 | 17.3% | |
| Never | 786 | 60.5% | |
| Unknown | 66 | 5.1% |
Continuous data presented as mean ± standard deviation (S.D.).
Categorical data presented as number (n) and percentage (%).
