Table 6. Comparison of postoperative (at 6 and 36 months after surgery) minimal cross-sectional area (MCA1 and MCA2) measurement with acoustic rhinometry among the groups with different degrees of septum deviation.

Variable	MCA1 postop6 mean (SD)	p a	MCA2 postop6 mean (SD)	p	MCA1 postop36 mean (SD)	p	MCA2 postop36 mean (SD)	p
Grade I ( N  = 19)	0.86 ± 0.05	0.000	1.36 ± 0.59	0.000	0.93 ± 0.15	0.03	1.31 ± 0.52	0.04
Grade II ( N  = 13)	0.77 ± 0.35		0.9 ± 0.09		0.82 ± 0.11		1.10 ± 0.41
Grade III ( N  = 8)	0.69 ± 0.08		0.69 ± 0.1		0.76 ± 0.17		0.86 ± 0.12

Abbreviations: MCA1, minimal cross-sectional area at the first 2 cm of the nasal cavity; MCA2, minimal cross sectional area between 2–5 cm into the nasal cavity; postop6, 6 months postoperatively; postopo36, 36 months postoperatively; SD, standard deviation.

Note: ^a Kruskal-Wallis test.