The Egyptian Journal of Otolaryngology

Table 2 Distribution of Keros classification according to the sides and age and sex of the patients

From: Assessment of ethmoid roof and olfactory fossa variations using Keros classification in a tertiary care hospital

		Right						Left
		Type 1		Type 2		Type 3		Type 1		Type 2		Type 3
		n	n%^a	n	n%^a	n	n%^a	n	n%^a	n	n%^a	n	n%^a
Age (in years)	7–26	5	15.2	60	28.6	4	30.7	10	26.3	57	27.3	2	22.2
	27–46	17	51.5	83	39.5	6	46.2	16	42.1	83	39.7	7	77.8
	47–66	11	33.3	51	24.3	3	23.1	11	29.0	54	25.8	0	0.0
	67–86	0	0	16	7.6	0	0.0	1	2.6	15	7.2	0	0.0
Sex	Male	20	60.6	108	51.4	11	84.6	20	52.6	114	54.5	5	55.6
Sex	Female	13	39.4	102	48.6	2	15.4	18	47.4	95	45.5	4	44.4

^aColumn percentages

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