Table 2. Mean changes of score between the three follow-up occasions (baseline, 3 years, and 10 years), regarding sun habits and sun protection behaviour, and the statistical significance according to the overall effect of time, group, and a combination of both.
| Model results | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Change in estimated marginal means | Tests of fixed effects, P value | |||||||||||
| Letter | Doctor's consultation | Phototest | ||||||||||
| A | B | C | A | B | C | A | B | C | Time | Group | Time x Group | |
| Sun habits/sun protection behaviour | ||||||||||||
| How often do you sunbathe with the intention to tan during the summer in Sweden? | -0.17 | -0.12 | -0.29a | -0.35b | 0.06 | -0.30a | -0.37b | -0.06 | -0.43b | <0.001 | 0.979 | 0.402 |
| How often do you usually go on a ‘sun vacation‘ abroad? | -0.02 | 0.04 | 0.01 | -0.09 | 0.10 | 0.01 | -0.01 | 0.10 | 0.09 | 0.220 | 0.748 | 0.897 |
| Do you usually use a sunscreen when sunbathing? | 0.16 | -0.24 | -0.08 | -0.39a | 0.21 | -0.18 | -0.09 | -0.09 | -0.18 | 0.125 | 0.787 | 0.032 |
| If you use sunscreens, which sun protection factor do you choose? | -0.19 | -0.34 | -0.54a | -0.54a | -0.30 | -0.84b | -0.23 | -0.20 | -0.43 | <0.001 | 0.281 | 0.371 |
| When in the sun, without intention to tan, how often do you use any of the following ways to protect from the sun: | ||||||||||||
| (a) sunscreens | 0.22 | -0.22 | 0.00 | -0.53b | 0.19 | -0.34 | -0.07 | -0.14 | -0.20 | 0.093 | 0.457 | 0.004 |
| (b) shirt or sweater with short sleeves | -0.16 | -0.07 | -0.23 | 0.00 | -0.25 | -0.25 | -0.19 | -0.12 | -0.31 | 0.009 | 0.805 | 0.708 |
| (c) shirt or sweater with long sleeves | -0.08 | -0.00 | -0.08 | -0.22 | 0.06 | -0.17 | -0.16 | -0.16 | -0.32 | 0.018 | 0.199 | 0.654 |
| (d) sun hat or cap | -0.06 | -0.03 | -0.09 | -0.24 | -0.00 | -0.24 | -0.14 | -0.06 | -0.21 | 0.068 | 0.038 | 0.890 |
| (e) trousers with long legs | -0.23 | 0.09 | -0.14 | -0.35a | -0.03 | -0.38a | -0.22 | -0.00 | -0.23 | <0.001 | 0.864 | 0.677 |
| (f) staying in the shade | -0.11 | -0.23 | -0.34a | -0.29c | 0.04 | -0.25 | -0.18 | -0.20 | -0.38a | <0.001 | 0.111 | 0.384 |
| How many times have you been sunburnt during the past year? | -0.09 | 0.04 | -0.05 | -0.19c | -0.02 | -0.21 | -0.20c | -0.07 | -0.27a | <0.001 | 0.907 | 0.291 |
| How often do you use a sunbed? | -0.15c | -0.01 | -0.17 | -0.13 | 0.02 | -0.11 | -0.16c | -0.15a | -0.31b | <0.001 | 0.542 | 0.109 |
| How long do you usually stay in the sun between 11am and 3pm (Jun–Aug)? | -0.30c | -0.10 | -0.40a | -0.40a | -0.18 | -0.58b | -0.06 | -0.21 | -0.27 | <0.001 | 0.791 | 0.222 |
| Propensity to increase sun protection | ||||||||||||
| Giving up sunbathing | -0.47a | -0.17 | -0.65b | -0.63b | -0.03 | -0.66b | -0.49a | -0.24 | -0.76b | <0.001 | 0.510 | 0.909 |
| Using clothes for sun protection | -0.22 | 0.04 | -0.17 | -0.26 | 0.08 | -0.18 | -0.29 | -0.07 | -0.35 | 0.006 | 0.199 | 0.925 |
| Using sunscreens | -0.07 | 0.03 | -0.05 | -0.32 | 0.28 | -0.04 | -0.09 | 0.04 | -0.05 | 0.131 | 0.557 | 0.658 |
| Staying in the shade | -0.34c | 0.76b | 0.42a | -0.74b | 0.93b | 0.19 | -0.22 | 0.82b | 0.60b | <0.001 | 0.626 | 0.073 |
| Attitudes towards sun exposure | ||||||||||||
| How do you like sunbathing? | -0.11 | -0.18 | -0.29a | -0.10 | -0.00 | -0.10 | 0.03 | -0.11 | -0.08 | 0.015 | 0.279 | 0.333 |
| Do you think that the advantages of sunbathing outweigh the disadvantages? | -0.29c | -0.15 | -0.44b | -0.29 | 0.14 | -0.15 | -0.04 | -0.22 | -0.26 | <0.001 | 0.885 | 0.139 |
| How extensive do you consider the health risks of sunbathing? | -0.06 | -0.14 | -0.20 | -0.35a | 0.19 | -0.16 | 0.08 | -0.05 | -0.03 | 0.079 | 0.895 | 0.028 |
| How extensive do you consider the risk for you to develop skin cancer? | -0.11 | -0.02 | -0.14 | -0.07 | 0.00 | -0.06 | 0.00 | -0.19 | -0.19 | 0.034 | 0.329 | 0.531 |
| How important is it for you to get tanned during the summer? | -0.08 | -0.11 | -0.18c | 0.01 | -0.14 | -0.13 | -0.15 | -0.13 | -0.28a | <0.001 | 0.077 | 0.542 |
| SEPI score | -0.45 | -0.37 | -0.82 | -2.20b | 0.15 | -2.04b | -1.20a | -0.83 | -2.04b | <0.001 | 0.312 | 0.005 |
a P<0.01. b P<0.001. c P<0.05.
A = change baseline to 3 years. B = change 3 to 10 years. C = change baseline to 10 years.
A negative value indicates change towards lowered risk behaviour, increased propensity to change behaviour, and lowered risk attitude, respectively. Šidák adjustment for multiple comparisons.