Table V.
Competing risk models for the influences of ultraviolet B (UVB) phototherapy on skin cancer
| Exposure variables | Treatment with UVB phototherapy | Number of UVB phototherapy treatments | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | p-value | HR | 95% CI | p-value | |
| Model 1a | 1.017 | 0.587–1.760 | 0.95 | 1.003 | 0.995–1.012 | 0.49 |
| Model 2b | 1.016 | 0.587–1.760 | 0.95 | 1.003 | 0.995–1.011 | 0.50 |
| Model 3c | 0.916 | 0.504–1.664 | 0.77 | 1.004 | 0.995–1.012 | 0.39 |
a
Model 1: Univariate model adjusted for the exposure variable of UVB phototherapy, using the Fine and Gray's subdistribution hazard model to consider the competing risk between death and skin cancer.
b
Model 2: Multivariate model adjusted for the variable in model 1 and for age and sex.
c
Model 3: Multivariate model adjusted for all variables in model 2 and for occupation, high UV index, organ transplantation, and the prescription of hydrochlorothiazide.
CI: confidence interval; HR: hazard ratio.