Table 1.

Demographic and disease-related characteristics of cohorts.

	Infiltrated cohort N = 130	Non-infiltrated cohort N = 63	p
Age	31.1 (SD 1.6)	35.5 (SD 1.1)	0.02
Sex (female:male)	45:18	89:41	0.67
Hurley I	26.9% (35)	23.8% (15)	0.4
II	54.6% (71)	49.2% (31)
III	18.4% (24)	26.9% (17)
Baseline IHS4	5.7 (SD 0.4)	7.4 (SD 0.6)	0.01
Systemic treatment	56.9% (74)	100% (63)	0.01

IHS4 International Hidradenitis Suppurativa Severity Scoring System, SD standard deviation.