Characteristics | Â | Breast-feeding duration | Â | Â | Â | Bottle-feeding duration | Â | Â | Â | ||
---|---|---|---|---|---|---|---|---|---|---|---|
 | 0-6 months | >6 months |  |  |  | 6-18 months | >18 months |  |  |  | |
 | n (%) | n (%) | OR | 95% CI | P | n (%) | n (%) | OR | 95% CI | P | |
Posterior crossbite | yes | 11(3.7) | 6(1.4) | Â | Â | Â | 9(3.0) | 8(1.9) | Â | Â | Â |
 | no | 289(96.3) | 428(98.6) | 3.13 | 1.11-8.82 | 0.031* | 296(97.0) | 421(98.1) | 2.03 | 0.73-5.66 | 0.173 |
No maxillary space | yes | 110(36.7) | 114(26.3) | Â | Â | Â | 83(27.2) | 130(30.3) | Â | Â | Â |
 | no | 190(63.3) | 320(73.7) | 1.63 | 1.23-2.98 | 0.038* | 222(72.8) | 299(69.7) | 1.13 | 0.80-1.58 | 0.485 |
Nonmesial step | yes | 108(36.0) | 157(36.2) | Â | Â | Â | 181(59.3) | 288(67.1) | Â | Â | Â |
 | no | 192(64.0) | 277(63.8) | 0.97 | 0.71-1.33 | 0.862 | 124(40.7) | 141(32.9) | 1.45 | 1.06-2.1 | 0.018* |
Class IIcanine relationship | yes | 92(30.7) | 135(31.1) | Â | Â | Â | 81(26.6) | 146(34.0) | Â | Â | Â |
 | no | 208(69.3) | 299(68.9) | 0.94 | 0.68-1.31 | 0.713 | 224(73.4) | 283(66.0) | 1.43 | 1.03-2.0 | 0.034* |
Anterior open bite | yes | 3(1.0) | 4(0.9) | Â | Â | Â | 3(1.0) | 4(0.9) | Â | Â | Â |
 | no | 297(99.0) | 430(99.1) | 0.87 | 0.18-4.26 | 0.861 | 302(99.0) | 425(99.1) | 0.61 | 0.12-3.18 | 0.559 |
Anterior crossbite | yes | 25(8.3) | 37(8.5) | Â | Â | Â | 30(9.8) | 32(7.5) | Â | Â | Â |
 | no | 289(96.3) | 428(98.6) | 0.93 | 0.54-1.61 | 0.792 | 275(90.2) | 397(92.5) | 0.67 | (0.39-1.16) | 0.152 |