Table 2.

Statistically significant differences in percent area of TGF-β₁ expression in the epithelium, controls versus CRSwNP patients

Epithelium
		Positive area (%)
	CRSwNP		Control
Mean	32.44		55.91
95% CI	32.06–38.80		42.63–69.18
Standard deviation	11.93		19.76
Minimum	13.56		24.39
Maximun	47.50		86.02

95%: CI, 95% confidence interval.

Student’s t test, p= 0.007.

Kolmogrow-Sminov test, polyposis group, p = 0.85; control group, p = 0.99.