Table 2.

SNOT-22 scores during follow-up.

	Groups
	CRSwNP		CRSsNP		Total
Time	Mean	SD	Mean	SD	Mean	SD
Before surgery	58.88	26.14	63.24	22.71	61.29	24.06
Three months after surgery	14.82	12.58	18.67	16.58	16.95	14.86
Late postoperative follow-up	34.06	24.54	30.95	22.23	32.34	23.02

Paired t-test CRSwNP:

Pre vs. PO3m: p < 0.0001*; Pre vs. POT: p = 0.008*; PO3m vs. POT: p = 0.008*

Paired t-test CRSsNP:

Pre vs. PO3m: p < 0.0001*; Pre vs. POT: p = 0.0001*; PO3m vs. POT: p = 0.05*

Paired t-test combined:

Pre vs. PO3m: p < 0.0001*; Pre vs. POT: p = 0.0001*; PO3m vs. POT: p = 0.001*

Unpaired t-test CRSwNP and CRSsNP:

Pre: p = 0.59; PO3m: p = 0.42; POT: p = 0.69

CRSwNP: Chronic rhinosinusitis with nasal polyps; CRSsNP: Chronic rhinosinusitis without nasal polyps; SNOT-22: SinoNasal Outcome Test - 22 questions; SD: Standard deviation; POT: Late postoperative follow-up.