TABLE 1.

Study participants’ characteristics at baseline.

No. of participants		109
Sex – No. (%)	Female Male	63 (57.8) 46 (42.2)
Age – yr	Mean (range) Median (IQR)	41.6 (20–81) 39.0 (32.0–48.5)
Smoking status – No. (%)	Non-smoker Smoker	83 (76.1) 26 (23.9)
Acute or chronic dermatosis – No. (%)	No Yes	109 (100) 0
Chronic underlying disease* – No. (%)	No Yes	103 (94.5) 6 (5.5)
Immunosuppression – No. (%)	No Yes	108 (99.1) 1** (0.9)

No., number; yr, year; IQR, interquartile range.

*Diabetes mellitus (n = 3, males), Crohn’s disease (n = 1, female), cystic fibrosis (n = 1, female), rheumatoid arthritis (n = 1, female.

**Iatrogenic immunosuppression (sulfasalazine for rheumatoid arthritis).