A positive association was observed between hidradenitis suppurativa (HS) and psoriasis, a recent study found. A cross-sectional study was conducted comparing the prevalence of HS among patients with psoriasis and among age-, gender- and ethnicity-matched control subjects.

A total of 68,836 patients with psoriasis and 68,836 controls were included. Researchers found:

• The prevalence of HS was increased in patients with psoriasis as compared to the control group (0.3% vs 0.2%, respectively; OR, 1.8).
• In a multivariate analysis adjusting for smoking, obesity, and other comorbidities, psoriasis was still associated with HS (OR, 1.8).
• Patients with coexistent psoriasis and HS were significantly younger (39.0±15.7 vs 42.6±21.2 years) and had a higher prevalence of obesity (35.1% vs 25.3%) and smoking (58.5% vs 37.3%) as compared to patients with psoriasis alone.