Table 1. Demographic Data for the 246 Ears with CAS.

	Cholesteatoma				No cholesteatoma	Total
	Stage I & II	Stage III	Stage IV	Subtotal
No.	53	55	28	136	110	246
Gender
Male	38	42	17	97	64	161
Female	15	13	11	39	46	85
Laterality
Left	18	17	11	46	60	106
Right	35	38	17	90	50	140
Age, mean ± SD, y	11.1 ± 7.3	10.8 ± 8.4	12.8 ± 8.0	11.3 ± 7.9	11.7 ± 6.2	11.5 ± 7.2
<6	12	13	4	29	3	32
6 ≤ Age ＜ 12	25	22	13	60	62	122
12 ≤ Age ＜ 18	5	15	5	25	30	55
≥18	11	5	6	22	15	37
Infection, n (%)	18 (33.9)	37 (67.2)	23 (82.1)	78 (57.3)	5 (4.5)	83 (33.7)
Microtia
Marx 0	12	8	3	23	26	49
Marx I	23	22	12	57	48	105
Marx II	12	15	6	33	22	55
Marx III	6	10	7	23	14	37