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Predictors of Unplanned Revision Surgery After Initial Spica Casting
| Variable | Odds Ratio | 95% CI | P Value |
| Age (continuous) | 1.3 | 1.1-1.6 | <0.001 |
| Age 5 or 6 yrsa | 1.9 | 1.3-2.7 | 0.001 |
| Sex | 1.1 | 0.3-4.8 | 0.90 |
| Geographic region | 0.6 | 0.3-1.1 | 0.09 |
CI = confidence interval
Age was first added to the model as a continuous variable, then separately as a categorical variable in another model.
