Table 3 The age-classified distribution of incompetent lip seal prevalence in Japanese children
Age (years) | Number of participants (n) | Distribution of ILS prevalence [n (%)]* | ||||
|---|---|---|---|---|---|---|
Yes | Think so | Do not think so | No | |||
3 | 253 | 18 (7.1) | 30 (11.9) | 58 (22.9) | 147 (58.1) | |
4 | 350 | 24 (6.9) | 55 (15.7) | 85 (24.3) | 186 (53.1) | |
5 | 371 | 34 (9.2) | 71 (19.1) | 87 (23.5) | 179 (48.2) | |
6 | 403 | 28 (6.9) | 83 (20.6) | 109 (27.0) | 183 (45.4) | |
7 | 407 | 35 (8.6) | 77 (18.9) | 129 (31.7) | 166 (40.8) | |
8 | 405 | 45 (11.1) | 91 (22.5) | 95 (23.5) | 174 (43.0) | |
9 | 390 | 36 (9.2) | 107 (27.4) | 111 (28.5) | 136 (34.9) | |
10 | 340 | 48 (14.1) | 79 (23.2) | 94 (27.6) | 119 (35.0) | |
11 | 276 | 36 (13.0) | 65 (23.6) | 63 (22.8) | 112 (40.6) | |
12 | 204 | 28 (13.7) | 53 (26.0) | 42 (20.6) | 81 (39.7) | |
Total | (n) | 3399 | 332 (9.8) | 711 (20.9) | 873 (25.7) | 1483 (43.6) |
(%) | 100.0 | 1043 (30.7) | 2356 (69.3) | |||