Univariable logistic regression | Multivariable logistic regression | |||||||
With osteonecrosis (frequency (%)) | Without osteonecrosis (frequency (%)) | OR | CI | p Value | OR | CI | p Value | |
Age (years) | ||||||||
<10 | 22 (1) | 2257 (99) | 1.00 | |||||
10–15 | 111 (18) | 496 (82) | 22.96 | 14.38 to 36.64 | <0.001 | 23.73 | 14.82 to 38.00 | <0.001 |
16–20 | 32 (17) | 154 (83) | 21.31 | 12.09 to 37.57 | <0.001 | 22.45 | 12.66 to 39.81 | <0.001 |
21+ | 3 (7) | 38 (93) | 8.10 | 2.32 to 28.22 | 0.001 | 8.32 | 2.38 to 29.12 | 0.001 |
Ethnicity | ||||||||
White | 141 (6) | 2384 (94) | 1.00 | |||||
Black | 3 (4) | 71 (96) | 0.73 | 0.23 to 2.35 | 0.60 | 0.94 | 0.27 to 3.23 | 0.92 |
Asian | 15 (6) | 217 (94) | 1.20 | 0.69 to 2.07 | 0.53 | 1.92 | 1.05 to 3.55 | 0.04 |
Other/unknown | 11 (4) | 271 (96) | 0.91 | 0.52 to 1.59 | 0.73 | 0.99 | 0.52 to 1.88 | 0.99 |
Gender | ||||||||
Male | 96 (5) | 1671 (95) | 0.91 | 0.65 to 1.28 | 0.59 | |||
Female | 74 (5) | 1272 (95) | 1.04 | 0.76 to 1.43 | 0.79 | 1.00 | ||
Number of delayed intensifications | ||||||||
2 | 138 (6) | 2142 (94) | 1.00 | |||||
1 | 31 (4) | 802 (96) | 0.85 | 0.59 to 1.22 | 0.38 | 0.99 | 0.67 to 1.45 | 0.94 |