Table 1

	N	NF height	MERP height	CP height	CP depth	CP width	OF width	LLCPA
	N	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)
General	770	50.44 (3.2)	26.35 (2.8)	20.66 (2.53)	5.67 (1.62)	2.72 (0.5)	3.51 (0.7)	74.16° (12.02°)
Gender
Female	290	49.94 (2.93)	26.39 (2.76)	20.68 (2.52)	5.69 (1.61)	2.67 (0.5)	3.43 (0.71)	74.55° (11.92°)
Male	95	51.97 (3.52)	26.21 (2.91)	20.59 (2.61)	5.62 (1.64)	2.84 (0.47)	3.77 (0.62)	72.97° (12.32°)
P-value		0.000^a	0.6	0.759	0.717	0.004^a	0.000^a	0.269
Age groups
9 - 18	83	49.65 (2.58)	26.28 (2.51)	20.64 (2.49)	5.63 (1.7)	2.73 (0.5)	3.61 (0.72)	76.42° (12.83°)
19 - 30	70	50.21 (3.77)	26.57 (3.14)	20.55 (2.63)	6.02 (1.67)	2.77 (0.56)	3.48 (0.77)	74.9° (10.7°)
31 - 45	76	50.09 (2.8)	25.66 (2.5)	20.27 (2.51)	5.38 (1.49)	2.71 (0.43)	3.43 (0.66)	73.99° (11.53°)
46 - 60	112	50.66 (3.02)	26.31 (2.77)	20.69 (2.57)	5.61 (1.44)	2.66 (0.51)	3.48 (0.62)	72.71° (11.84°)
61 - 77	44	52.35 (3.69)	27.36 (3.05)	21.47 (2.33)	5.86 (1.96)	2.76 (0.49)	3.61 (0.81)	72.70° (13.43°)
P-value		0.000^b	0.027^b	0.168	0.163	0.631	0.436	0.242
Side
Right	385	50.21 (3.34)	26.1 (2.96)	20.5 (2.54)	5.59 (1.79)	2.73 (0.58)	3.49 (0.75)	72.23° (13.76°)
Left	385	50.67 (3.33)	26.59 (2.89)	20.82 (2.58)	5.76 (1.81)	2.7 (0.63)	3.54 (0.86)	76.09° (14.41°)
P-value		0.000^a	0.000^a	0.000^a	0.038^a	0.405	0.242	0.000^a
Keros classification
Type I	137	48.28 (2.97)	24.45 (2.48)	21.11 (2.53)	3.3 (0.83)	2.66 (0.67)	3.53 (0.81)	66.82° (15.71°)
Type II	554	50.61 (3.18)	26.4 (2.75)	20.6 (2.59)	5.79 (1.15)	2.72 (0.6)	3.53 (0.82)	75.1° (13.29°)
Type III	79	53.01 (2.79)	29.24 (2.41)	20.30 (2.34)	8.93 (0.87)	2.80 (0.48)	3.38 (0.64)	80.26° (13.95°)
P-value		0.000^b	0.000^b	0.049^b	0.000^b	0.249	0.286	0.000^b
Gera classification
Type I	267	50.92 (3.2)	26.78 (2.82)	20.46 (2.56)	6.29 (1.82)	2.77 (0.53)	3.41 (0.79)	88.82° (9.15°)
Type II	485	50.24 (3.41)	26.17 (2.96)	20.76 (2.55)	5.40 (1.7)	2.68 (0.63)	3.53 (0.82)	67.18° (8.1°)
Type III	18	48.93 (2.51)	24.72 (2.76)	20.85 (2.94)	3.86 (1.13)	2.95 (0.64)	3.77 (0.58)	44.80° (16.91°)
P-value		0.004^b	0.001^b	0.293	0.000^b	0.032^b	0.281	0.000^b

^aStatistically significant at level P ≤ 0.05 (independent samples t-test).
^bStatistically significant at level P ≤ 0.05 (ANOVA test).
N = number of patients, OF = olfactor fossa; SD = standard deviation; NF = nasal floor; MERP = medial etmoid roof point; CP = cribriform plate; LLCPA = lateral lamella cribriform plate angle.