Model | OR*_{covariate} (95% CI) | Test statistic (χ^{2})^{†} | P | |||
---|---|---|---|---|---|---|

RHC + hair color | ||||||

1. Effect of RHC | 2.08 (1.03-4.22) | 3.94 | 0.05 | |||

2. Effect of red/blond hair | 1.96 (0.96-3.97) | 3.15 | 0.08 | |||

RHC + sunburns | ||||||

1. Effect of RHC | 2.33 (1.16-4.67) | 5.28 | 0.02 | |||

2. Effect of high propensity to sunburn | 3.08 (0.91-10.46) | 4.17 | 0.04 | |||

RHC + dysplastic nevi | ||||||

1. Effect of RHC | 2.21 (1.11-4.44) | 4.73 | 0.03 | |||

2. Effect of dysplastic nevi | 2.93 (1.46-5.88) | 8.53 | <0.01 | |||

RHC + number of nevi | ||||||

1. Effect of RHC | 2.26 (1.13-4.52) | 5.02 | 0.03 | |||

2. Effect of high number of nevi | 2.47 (1.25-4.90) | 6.57 | 0.01 |

↵* The OR of hazard function associated with each covariate [OR = exp(

*β*)] and 95% CI were computed from the corresponding estimate of the regression parameter of that covariate (*β*).↵† Tests are based on likelihood ratios and are two sided. Test of RHC variants was conducted by comparing a model with a given host factor (and no effect of RHC) to a model including both RHC and the host factor. Test of a given host factor was conducted by comparing a model with RHC variants (and no effect of the host factor) to a model including both RHC and the host factor. These likelihood ratio tests follow a χ

^{2}with 1 degree of freedom.