Table 2.

The variables that were likely predictive risk factors for developing acne

Variables	Odds ratio	95% confidence interval	P-value
Male	1.424	0.735–2.761	0.294
Educational status	0.637	0.379–1.069	0.143
Cigarette smoking	0.631	0.318–1.253	0.187
Alcohol consumption	0.574	0.192–1.719	0.317
Demodex positivity	5.286	2.299–12.153	< 0.001
Familial history of acne	1.874	0.944–3.719	0.070
Keeping an animal at home	0.599	0.300–1.193	0.143

Demodex positivity was a risk factor for developing acne vulgaris (p < 0.001).