Table 2.
Multivariate Cox regression analysis including all variables for predicting the overall survival of retinoblastoma patients.
| Characteristic | HR* | 95% CI | P-value |
|---|---|---|---|
| Size | .009 | ||
| Size < 16 cm | Reference | ||
| Size ≥ 16 cm | 2.576 | 1.180-5.626 | .018 |
| Unknown | 0.851 | 0.344-2.103 | .727 |
| Laterality | .048 | ||
| Unilateral | Reference | ||
| Bilateral | 1.938 | 1.005-3.735 | .048 |
| Rural-urban | .138 | ||
| Urban | Reference | ||
| Rural-urban | 1.943 | 0.536-7.047 | .312 |
| Rural | 3.431 | 0.980-12.007 | .054 |
| Year of diagnosis | .084 | ||
| 2004-2007 | Reference | ||
| 2008-2011 | 2.716 | 1.123-6.567 | .027 |
| 2012-2015 | 1.947 | 0.731-5.182 | .182 |
| Income | .612 | ||
| Low income | Reference | ||
| Middle income | 1.008 | 0.383-2.656 | .987 |
| High income | 1.442 | 0.551-3.769 | .456 |
Rural-urban represents “Rural-urban fringe zone.”
*HR, Hazard Ratio (describes death from disease).