| Age (months) | Pacifier users n (%) | Non-pacifier users n (%) | Total | P value |
| 1 | 176 (88) | 321 (93.9) | 497 | 0.051 |
| 2 | 163 (81.5) | 312 (91.2) | 475 | 0.003 |
| 3 | 141 (70.9) | 300 (87.7) | 441 | 0.000 |
| 4 | 130 (65) | 295 (86.3) | 425 | 0.000 |
| 5 | 110 (55) | 277 (81.2) | 387 | 0.000 |
| 6 | 104 (52) | 276 (80.7) | 380 | 0.000 |