Table 2.

Proportion of patients with SAA and CRP levels exceeding the normal range upper limit value in AU and CU respectively. In 39 patients (90.7%) with AU and 11 patients (28.9%) with CU, the SAA concentration exceeded the normal range upper limit value (0-10 mg/L), and in 31 patients (72.1%) with AU and 5 patients (13.2%) with CU, the CRP concentration exceeded the normal-range upper limit value (0-5 mg/L). We observed a significant difference in the proportion of SAA and CRP in patients with AU and CU (90.7% and 28.9%, χ² = 29.99, p < 0.001; 72.1% and 13.2%, χ² = 26.04, p < 0.001, respectively)

Cut-off value		Numbers of AU	Numbers of CU	χ2	P
		aboveCut-off	aboveCut-off
SAA	10 mg/L	39/43 (90.7%)	11/38 (28.9%)	29.99	<0.001
CRP	5 mg/L	31/43(72.1.%)	5/38 (13.2%)	26.04	<0.001

AU: acute urticaria; CU: chronic urticaria; SAA: serum amyloid A; CRP: C-reactive protein.