Table 3.

Multivariate analysis of results.

Variable	Odds ratio	95% Wald confidence limits	p value
Family history of acne	2.11	0.03–1.28	0.137
Full-fat milk	1.57	0.82–3.00	0.176
Skimmed milk	0.75	0.23–1.07	0.323
Dairy products (yogurt and cheese)	1.06	0.12–2.17	0.733
Protein supplement intake	0.83	0.33–2.09	0.687
Whey supplement	2.94	1.11–7.82	0.030
Casein and whey supplement	1.70	0.24–2.02	0.097
Creatine supplement	1.81	0.07–1.03	0.448