Logistic regression analysis of sunbed use (ever use) in Denmark 2007–2015 by demographic factors and annual percentage decrease in sunbed use overall and by factor levels
| Characteristic (%) Total (n) | Total (n) | % or mean | Crude OR (95% CI) | Adjusted OR (95% CI)* | Adjusted OR (95% CI)† | Sunbed use annual change | Sunbed use annual change (adjusted) |
| Total (n) | 37 562 | 18 | 34 616 | 34 616 | 34 616 | 0.97 (0.97–0.97) | 0.97 (0.97–0.97) |
| Gender | P<0.001 | P<0.001 | P<0.001 | ||||
| Male | 18 325 | 13 | 1 (ref) | 1 (ref) | 1 (ref) | 0.99 (0.98–1.00) | |
| Female | 19 237 | 22 | 2.78 (2.66 to 2.90) | 3.02 (2.88 to 3.16) | 2.66 (2.53 to 2.79) | 0.95 (0.95–0.96) | |
| Age group (years) | P<0.001 | P<0.001 | P<0.001 | ||||
| 15–19 | 3383 | 27 | 1.38 (1.25 to 1.53) | 1.30 (1.17 to 1.44) | 1.03 (0.92 to 1.15) | 0.91 (0.90–0.92) | |
| 20–29 | 5970 | 25 | 3.22 (2.95 to 3.51) | 3.28 (2.99 to 3.61) | 3.06 (2.78 to 3.37) | 0.90 (0.89–0.91) | |
| 30–39 | 7369 | 19 | 4.37 (4.01 to 4.76) | 4.53 (4.11 to 4.98) | 4.78 (4.33 to 5.28) | 0.94 (0.93–0.96) | |
| 40–49 | 8419 | 18 | 2.97 (2.74 to 3.23) | 3.01 (2.75 to 3.30) | 2.95 (2.69 to 3.24) | 1.00 (0.99–1.01) | |
| 50–59 | 7529 | 12 | 1.49 (1.37 to 1.62) | 1.48 (1.36 to 1.62) | 1.45 (1.32 to 1.58) | 1.00 (0.99–1.00) | |
| 60–64 | 3922 | 8 | 1 (ref) | 1 (ref) | 1 (ref) | 0.99 (0.97–1.00) | |
| Skin type | P<0.001 | P<0.001 | P<0.001 | ||||
| I | 4534 | 13 | 1.08 (0.92 to 1.28) | 0.64 (0.54 to 0.76) | 0.80 (0.66 to 0.95) | 0.97 (0.96–0.98) | |
| II | 19 252 | 18 | 1.19 (1.02 to 1.36) | 0.92 (0.78 to 1.09) | 0.99 (0.83 to 1.17) | 0.97 (0.97–0.97) | |
| III | 12 141 | 19 | 0.96 (0.82 to 1.13) | 0.90 (0.76 to 1.07) | 0.93 (0.78 to 1.10) | 0.98 (0.96–0.98) | |
| IV–VI | 733 | 23 | 1 (ref) | 1 (ref) | 1 (ref) | 0.98 (0.95–1.00) | |
| Region | P<0.001 | P<0.001 | P<0.001 | ||||
| Capital | 12 998 | 15 | 1 (ref) | 1 (ref) | 1 (ref) | 0.97 (0.97–0.98) | |
| Zealand | 4652 | 16 | 0.88 (0.82 to 0.97) | 1.15 (1.04 to 1.27) | 0.99 (0.92 to 1.07) | 0.98 (0.96–0.99) | |
| Northern Jutland | 3730 | 21 | 1.17 (1.08 to 1.26) | 0.93 (0.87 to 1.01) | 1.30 (1.20 to 1.42) | 0.97 (0.96–0.98) | |
| Central Jutland | 8042 | 19 | 1.08 (1.02 to 1.14) | 1.15 (1.08 to 1.22) | 1.18 (1.10 to 1.25) | 0.96 (0.95–0.97) | |
| Southern Denmark | 6985 | 18 | 0.99 (0.94 to 1.06) | 1.08 (1.01 to 1.15) | 1.11 (1.04 to 1.19) | 0.97 (0.97–0.98) | |
| Education | P<0.001 | P<0.001 | P<0.001 | ||||
| <10 years | 9313 | 17 | 0.64 (0.61 to 0.68) | 1.01 (0.94 to 1.07) | 1.10 (1.03 to 1.17) | 0.97 (0.96–0.98) | |
| 10–12 years | 7130 | 20 | 1.04 (0.99 to 1.09) | 1.12 (1.06 to 1.19) | 1.16 (1.10 to 1.22) | 0.95 (0.95–0.96) | |
| >12 years | 7682 | 18 | 1 (ref) | 1 (ref) | 1 (ref) | 0.98 (0.98–0.99) | |
| Sunbathe | P<0.001 | NA | P<0.001 | ||||
| Yes | 24 240 | 24 | 4.16 (3.85 to 4.49) | 2.73 (2.59 to 2.87) | 0.96 (0.96–0.97) | ||
| No | 13 322 | 7 | 1 (ref) | 1 (ref) | 0.99 (0.99–1.00) | ||
| Have children <18 years in the household | N P<0.001 | P=0.030 | P=0.085 | ||||
| Yes | 12 461 | 18 | 1.55 (1.49 to 1.63) | 1.06 (1.01 to 1.12) | 1.05 (0.99 to 1.11) | 0.96 (0.96–0.97) | |
| No | 25 101 | 17 | 1 (ref) | 1 (ref) | 1 (ref) | 0.98 (0.97–0.98) | |
| Temperature (°C) | P<0.001 | NA | P<0.001 | ||||
| 1.11 (1.08 to 1.13) | 1.15 (1.11 to 1.19) | ||||||
| Sun hours (/100/summer) | P<0.001 | NA | P=0.004 | ||||
| 1.13 (1.08 to 1.19) | 1.23 (1.07 to 1.42) | ||||||
| Days with rain/month | P<0.001 | NA | P<0.001 | ||||
| 0.99 (0.98 to 0.99) | 1.04 (1.03 to 1.06) |
ORs and CIs
*Model adjusted for gender, age, education, skin type, have children and region.
†Model additionally adjusted for sunbathing and weather indicators.
NA, not applicable.