Table 3.

Results of the multivariate analysis of the variables associated with acne

Variables (n=516)	OR (95% CI)	p-value
Age, years	1.11 (1.04–1.18)	0.001
Physical exercise
No/occasionally	1*
Regularly	0.49 (0.29–0.84)	0.009
On a diet
No	1
Yes	0.31 (0.13–0.74)	0.009
Sibling history of acne
No	1
Yes	4.13 (2.55–6.69)	<0.001
Whole milk
<3 days/week	1
≥3 days/week	2.36 (1.39–4.01)	0.002
Low fat milk
<3 days/week	1
≥3 days/week	1.95 (1.10–3.45)	0.021
Egg
<3 days/week	1
≥3 days/week	1.95 (1.20–3.17)	0.007
Fresh vegetables
<3 days/week	1
≥3 days/week	0.54 (0.31–0.92)	0.068
Chicken
<3 days/week	1
≥3 days/week	0.27 (0.15–0.49)	<0.001
Chocolate
<3 days/week	1
≥3 days/week	2.19 (1.36–3.53)	0.001
Potato chips
<3 days/week	1
≥3 days/week	3.57 (2.20–5.80)	<0.001

Note: *Reference groups.

Abbreviations: OR, odds ratio; CI, confidence interval.