Table 2.
Univariate analysis and multivariate logistic regression analysis of factors associated with sunscreen use. CI, confidence interval; NA, not applicable; OR, odds ratio.
| Factor | Univariate analysis | Multivariate analysis | ||||||
|---|---|---|---|---|---|---|---|---|
| Never used sunscreen n (%) | Use sunscreen n (%) | P value | OR | 95% CI | P value | |||
| Participants | 496 (49%) | 515 (51%) | NA | NA | NA | NA | NA | |
| Gender | Male∗ | 380 (74%) | 130 (26%) | <0.001 | 1 | |||
| Female | 116 (23%) | 385 (77%) | 10.038 | 7.219 | 13.957 | <0.001 | ||
| College year | Junior∗ | 260 (49%) | 270 (51%) | 0.998 | 1 | |||
| Senior | 236 (49%) | 245 (51%) | 0.932 | 0.674 | 1.287 | 0.668 | ||
| Family income | 2,000–10,000∗ | 101 (60%) | 68 (40%) | <0.001 | 1 | |||
| 10,001–20,000 | 166 (57%) | 123 (43%) | 1.547 | 0.95 | 2.52 | 0.079 | ||
| >20,000 | 209 (42%) | 289 (58%) | 2.614 | 1.668 | 4.098 | <0.001 | ||
| Number of sunburns | None∗ | 368 (57%) | 275 (43%) | <0.001 | 1 | |||
| One | 73 (42%) | 101 (58%) | 1.973 | 1.284 | 3.033 | 0.002 | ||
| Two | 26 (28%) | 67 (72%) | 4.274 | 2.366 | 7.723 | <0.001 | ||
| Three | 14 (35%) | 26 (65%) | 2.133 | 0.947 | 4.802 | 0.067 | ||
| More than three | 11 (23%) | 37 (77%) | 5.373 | 2.348 | 12.295 | <0.001 | ||
| Use of tanning beds | No∗ | 482 (51%) | 468 (49%) | <0.001 | 1 | |||
| Yes | 10 (22%) | 36 (78%) | 2.430 | 1.029 | 5.742 | 0.043 | ||
| Use of other sun protection methods | No∗ | 129 (66%) | 66 (34%) | <0.001 | 1 | |||
| Yes | 352 (45%) | 424 (55%) | 1.779 | 1.158 | 2.734 | 0.009 | ||
∗Reference group.