Table 1. Concurrence of accessory maxillary ostium with neighboring morphologic variants.

Variations	Presence/absence of right AMO N (%)	Presence/absence of left AMO N (%)	Presence/absence of bilateral AMO N (%)	Presence/absence of total AMO N (%)	OR
Agger nasi cell	12–6 (28.6–1.7)	1–4 (2.4–1.1)	13–6 (15.5–0.8)	26–16 (31–2.2)	1.77
Haller cell	1–17 (2.4–4.75)	0–5 (0–1.4)	4–15 (4.7–2.1)	5–37 (5.9–5.16)	1.20
Nasal septum deviation	10–8 (23.8–2.2)	0–5 (0–1.4)	10–9 (11.9–1.25)	20–22 (23.8–3.07)	1.32
Hypertrophy of inferior concha	10–8 (23.8–2.2)	0–5 (0–1.4)	9–10 (10.7–1.4)	19–23 (22.6–3.2)	1.61
Pneumatization of middle concha	5–13 (11.9–3.6)	0–5 (0–1.4)	2–17 (2.9–2.4)	7–35 (8.3–4.9)	1.20
Mucus retention cysts	1–17 (2.4–4.75)	0–5 (0–1.4)	1–18 (1.2–2.5)	2–40 (2.4–5.6)	0.50
Maxillary sinusitis	10–8 (23.8–2.2)	3–2 (7.1–0.5)	11–8 (13.1–1.1)	24–18 (28.6–2.5)	1.39
Mucosal thickening	6–12 (14.3–3.3)	0–5 (0–1.4)	4–15 (4.7–2.1)	10–32 (11.9–4.5)	0.98

Abbreviations: AMO, accessory maxillary ostium; OR, odds ratio.

Note: In patients with AMO, the first number in the table represents the number of patients with corresponding left column variation, and the second number represents the number of patients without variation.