Main finding
The overall prevalence of urticaria in patients with rhinitis was 17.6% (95% CI, 13.2%–21.9%). The pooled prevalence of rhinitis was 31.3% (95% CI, 24.2%–38.4%) in patients with urticaria, and the rhinitis in patients with AU and CU was 31.6 (95% CI, 7.4%–55.8%) and 28.7% (95% CI, 20.4%–36.9%), respectively. The occurrence of rhinitis was significantly associated with urticaria (OR, 2.67; 95% CI, 2.625–2.715).