Characteristics of study population
| Non-responders | Responders | Invited | ||||
|---|---|---|---|---|---|---|
| N | Per cent | N | Per cent | N | Per cent | |
| Age (median/IQR, mean, SD) | 43.0/(30.4–57.2), 45.1, 0.28 | 48.5/(35.1–59.4), 48.3, 0.1 | 48.5/(35.1–59.4), 47.9, 0.1 | |||
| Gender | ||||||
| Male | 1718 | 48.5 | 7093 | 33.87 | 8811 | 35.9 |
| Female | 1823 | 51.4 | 13 846 | 66.13 | 15 669 | 64.0 |
| Age group | ||||||
| <45 | 1887 | 53.2 | 8761 | 41.8 | 10 648 | 43.5 |
| 45+ | 1654 | 46.7 | 12 178 | 58.1 | 13 832 | 56.5 |
| Place of residence | ||||||
| Rural | 1541 | 43.5 | 9900 | 47.2 | 11 441 | 46.7 |
| City <20 000 | 414 | 11.6 | 4038 | 19.2 | 4452 | 18.1 |
| City 20 000–49 000 | 434 | 12.2 | 2221 | 10.6 | 2655 | 10.8 |
| City 50 000–99 000 | 196 | 5.5 | 811 | 3.8 | 1007 | 4.1 |
| City 100 000–499 000 | 207 | 5.8 | 2693 | 12.8 | 2900 | 11.8 |
| City 500 000 or larger | 749 | 21.1 | 1276 | 6.0 | 2025 | 8.2 |
| Province | ||||||
| Dolnośląskie | 236 | 6.6 | 1946 | 9.2 | 2182 | 8.9 |
| Kujawsko-pomorskie | 158 | 4.4 | 1845 | 8.8 | 2003 | 8.1 |
| Lubelskie | 223 | 6.3 | 2469 | 11.7 | 2692 | 11.0 |
| Łódzkie | 682 | 19.2 | 2117 | 10.1 | 2799 | 11.4 |
| Małopolskie | 888 | 25.0 | 3143 | 15.0 | 4031 | 16.4 |
| Mazowieckie | 277 | 7.8 | 1980 | 9.4 | 2257 | 9.2 |
| Podkarpackie | 431 | 12.1 | 1820 | 8.6 | 2251 | 9.2 |
| Podlaskie | 256 | 7.2 | 2064 | 9.8 | 2320 | 9.4 |
| Pomorskie | 216 | 6.1 | 1674 | 7.9 | 1890 | 7.7 |
| Zachodniopomorskie | 174 | 4.9 | 1881 | 8.9 | 2055 | 8.3 |
| Total | 3541 | 100 | 20 939 | 100 | 24 480 | 100 |