The Effect of Whey Protein Supplements on Acne Vulgaris among Male Adolescents and Young Adults: A Case-Control Study from North of Jordan

Table 2

Comparison of the type, duration, and weekly frequency of protein supplement consumption between cases and controls.

Variable	Cases N = 59		Controls N = 43		value
	n	(n/N)%	n	(n/N)%
Whey supplement	47	(79.6)	28	(65.1)	0.004
Casein and whey supplements	8	(13.5)	9	(20.9)	0.982
Creatine supplement	4	(6.7)	6	(13.9)	0.301
Duration of protein supplements (weeks)					0.099
1–4	14	(23.7)	16	(37.3)
5–8	11	(18.6)	2	(4.6)
9–12	9	(15.3)	4	(9.3)
>12	25	(42.4)	21	(48.8)
Frequency of supplement intake (days/week)					0.284
3	2	(3.4)	2	(4.7)
4	7	(11.9)	2	(4.7)
5	12	(20.3)	14	(32.5)
6	10	(16.9)	5	(11.6)
7	28	(47.5)	20	(46.5)