Table 5. Regression analysis of factors affecting using of sunscreen comparing always to never use.

*Significant p-values.

Variables		Odd ratio 95% confidence interval	p-Value
Gender	Male	Reference
	Female	18.0 (7.46-45.860)	0.001*
Age (years)	18-20	Reference
	21-23	2.28 (1.00-5.199)	0.049*
	24-26	0.88 (0.33-2.33)	0.804
	27-29	0.92 (0.08-9.47)	0.945
	30 or older	0.54 (0.02-11.87)	0.698
Educational level	1st year	Reference
	2nd year	3.65 (1.09-12.26)	0.035*
	3rd year	4.18 (1.28-13.61)	0.017*
	4th year	9.04 (2.44-36.26)	0.001*
	5th year	0.28 (0.03-2.34)	0.239
	6th year	3.48 (0.89-13.53)	0.071
	Intern	1.28 (0.35-4.71)	0.7038
Region	Central region	Reference
	Northern region	1.09 (0.35-3.35)	0.879
	Southern region	0.42 (0.13-1.46)	0.176
	Eastern region	0.15 (0.04-0.48)	0.001*
	Western region	0.34 (0.11-1.05)	0.063