Table 1 Characteristic of the study population and odds ratios using logistic regression for all variables
variable | Case n = 400 | Control n = 200 | Odds ratio (95% CI) | P-value |
|---|---|---|---|---|
weight less than 1500 g | ||||
No | 344 | 191 | 1 | 0.026 |
Yes | 38 | 9 | 2.34(1.11,4.95) | |
hospitalization in NICU | ||||
No | 340 | 194 | 1 | < 0.001 |
Yes | 59 | 6 | 5.61(2.37,13.23) | |
hypoxia | ||||
No | 341 | 179 | 1 | 0.039 |
Yes | 59 | 17 | 1.82(1.03,3.21) | |
Bilirubin more than 10 | ||||
No | 306 | 184 | 1 | < 0.001 |
Yes | 94 | 16 | 3.53(2.01,6.18) | |
Gestational age over 35 | ||||
No | 348 | 197 | 1 | < 0.001 |
Yes | 46 | 3 | 8.68(2.66,28.27) | |
Gestational diabetes | ||||
No | 383 | 196 | 1 | 0.167 |
Yes | 17 | 4 | 2.17(0.77,6.552) | |
Meningitis | ||||
No | 382 | 198 | 1 | 0.040 |
Yes | 18 | 2 | 4.66(1.07,20.30) | |
high fever and seizures | ||||
No | 304 | 182 | 1 | < 0.001 |
Yes | 96 | 18 | 3.19(1.86,5.45) | |
family history of hearing loss | ||||
No | 235 | 195 | 1 | < 0.001 |
Yes | 165 | 5 | 27.38(11.02,68.01) | |
consanguineous marriage | ||||
No | 124 | 174 | 1 | < 0.001 |
Yes | 276 | 26 | 14.89(9.37,23.67) | |
congenital infection (TORCH) | ||||
No | 379 | 198 | 1 | 0.022 |
Yes | 21 | 2 | 5.48(1.27,23.63) | |
intracranial hemorrhage | ||||
No | 224 | 187 | 1 | < 0.001 |
Yes | 176 | 13 | 11.30(6.22,20.50) | |