Table 2 The distribution of extra-oral features of malocclusion according to gender
Parameters | Gender N (%) | X2 (P) | Total (N = 606) | |||
|---|---|---|---|---|---|---|
Male (N = 280) | Female (N = 326) | N | % | |||
Antero-posterior facial profile pattern | Class I | 172 (61.0) | 187 (57.4) | 1.59 (0.45) | 359 | 59.2 |
Class II | 77 (28.0) | 105 (32.2) | 182 | 30.0 | ||
Class III | 31 (11.0) | 34 (10.4) | 65 | 10.7 | ||
Facial convexity | Convex | 134 (48.0) | 158 (48.0) | 1.83 (0.40) | 292 | 48.2 |
Straight | 138 (49.0) | 152 (47.0) | 290 | 47.9 | ||
Concave | 8 (3.00) | 16 (5.00) | 24 | 4.00 | ||
Soft tissue FMPA | High | 93 (33.0) | 113 (35.0) | 6.38 (0.041)* | 206 | 34.0 |
Average | 133 (48.0) | 174 (53.0) | 307 | 50.7 | ||
Low* | 54 (19.0) | 39 (12.0) | 93 | 15.3 | ||
NLA | Acute | 37 (13.0) | 47 (14.0) | 1.15 (0.56) | 84 | 13.9 |
Average | 216 (77.0) | 240 (74.0) | 456 | 75.2 | ||
Obtuse | 27 (10.0) | 39 (12.0) | 66 | 10.9 | ||
Lip competency | Competent | 202 (72.0) | 238 (73.0) | 0.056 (0.81) | 440 | 72.6 |
Incompetent | 78 (28.0) | 88 (27.0) | 166 | 27.4 | ||
Upper lip prominence | Prominent | 40 (14.3) | 43 (13.0) | 0.153 (0.93) | 83 | 13.7 |
Average | 180 (64.3) | 212 (65.0) | 392 | 64.7 | ||
Retrusive | 60 (21.4) | 71 (22.0) | 131 | 21.6 | ||
Lower lip prominence | Prominent | 59 (21.0) | 63 (19.3) | 2.47 (0.29) | 122 | 20.1 |
Average | 213 (76.0) | 259 (79.5) | 472 | 77.9 | ||
Retrusive | 8 (3.00) | 4 (1.20) | 12 | 2.00 | ||