Table 4. The Pearson's correlation coefficients between the secreted sebum level and acne number in each zone according to sex and age difference.

	Total patients	Male	Female	<25 years	≥25 years
No. of the patients	67	39	28	53	14
T zone
No. of lesion	13.2±9.6	11.2±9.5	16.1±9.1	13.9±9.8	10.6±8.7
r	0.231 (0.060)	0.310 (0.055)	0.383 (0.044)*	0.292 (0.034)*	−0.148 (0.614)
p-value
Forehead
No. of lesion	6.7±7.0	5.7±6.8	8.1±7.2	7.1±7.5	5.3±4.7
r	0.150 (0.224)	0.129 (0.434)	0.212 (0.278)	0.194 (0.163)	−0.162 (0.579)
p-value
Nose
No. of lesion	1.5±1.6	1.6±1.8	1.5±1.4	1.7±1.7	1.1±1.3
r	0.198 (0.110)	0.264 (0.110)	0.007 (0.973)	0.200 (0.156)	−0.043 (0.885)
p-value
Chin
No. of lesion	5.0±4.0	3.9±3.5	6.5±4.2	5.1±4.0	4.3±4.1
r	0.059 (0.682)	0.038 (0.841)	0.502 (0.024)*	0.074 (0.649)	−0.162 (0.656)
p-value
U zone
No. of lesion	24.1±14.7	25.3±16.5	22.4±11.8	25.0±13.9	20.9±17.6
r	0.362 (0.003)*	0.335 (0.037)*	0.432 (0.022)*	0.482 (0.000)*	−0.221 (0.448)
p-value
Right cheek
No. of lesion	12.1±7.8	12.9±8.6	11.1±6.5	12.8±7.5	9.6±8.5
r	0.349 (0.004)*	0.356 (0.026)*	0.389 (0.041)	0.431 (0.001)*	−0.117 (0.691)
p-value
Left cheek
No. of lesion	12.0±7.5	12.4±8.3	11.4±6.1	12.2±6.9	11.3±9.6
r	0.304 (0.012)*	0.248 (0.128)	0.305 (0.115)	0.434 (0.001)*	−0.118 (0.687)
p-value
Whole face
No. of lesion	37.3±20.6	36.5±22.2	38.6±18.4	38.9±19.6	31.5±23.8
r	0.326 (0.007)*	0.355 (0.026)*	0.470 (0.012)*	0.468 (0.000)*	−0.322 (0.262)
p-value

r: correlation coefficient. ^*Significant correlation at the 5% level.