Table 4.

Relationship between serum zinc level and type of acne lesions.

Type and location of acne lesions	Standard deviation	r	P value
Comedones on the left cheek	2.15	0.23	0.049
Papules on the forehead	2.52	−0.26	0.039
Papules on the chest and upper back	5.36	−0.35	0.016
Pustules on the right cheek	2.59	−0.28	0.011
Pustules on the chin	2.23	−0.34	0.008
Pustules on the chest and upper back	10.32	−0.39	0.006