Table 3.
Models with categorical covariates.
| Model 1 | Variables 2 | Wald Test 3 | Coefficients βn 4 | Exp 5 | Confidence Intervals 6 |
|---|---|---|---|---|---|
| IC | T2 | 6.152; <0.0001 | 0.835 | 2.305 | 1.77–3.02 |
| T3 | 7.086; <0.0001 | 1.286 | 3.619 | 2.56–5.22 | |
| Age 5–8 | −0.022; 0.98 | −0.005 | 0.995 | 0.61–1.62 | |
| Age 9–12 | 1.872; 0.06 | 0.456 | 1.579 | 0.98–2.56 | |
| Age > 12 | 3.207; <0.002 | 0.905 | 2.472 | 1.43–4.32 | |
| IIC | S2 | 2.266; <0.03 | 0.29 | 1.337 | 1.04–1.72 |
| S3 | 5.069; <0.0001 | 0.761 | 2.141 | 1.60–2.88 | |
| S4 | 7.257; <0.0001 | 1.144 | 3.14 | 2.31–4.29 | |
| S5 | 8.036; <0.0001 | 1.594 | 4.922 | 3.36–7.32 | |
| Age 5–8 | −0.044; 0.96 | −0.011 | 0.989 | 0.61–1.62 | |
| Age 9–12 | 1.751; 0.08 | 0.431 | 1.538 | 0.95–2.50 | |
| Age > 12 | 2.976; 0.003 | 0.846 | 2.331 | 1.34–4.09 |
1. Model: Model IC: macroscopic tumor size split according to WHO (T1 < 3 cm, T2 = 3–5 cm, and T3 > 5 cm); Model IIC: macroscopic size split according to Soremno (S1 < 1 cm, S2 = 1 to <2 cm, S3 = 2 to <3 cm, S4 = 3 to < 5 cm, S5 > 5 cm); 2. Covariates included in the model. Reference levels are T1 and age 0–4 years for model IC, tumor size 0–1 cm and age 0–4 years for model IIC; 3. Wald test statistic: z; P value; 4. Model parameters βn; 5. Exponentiated model parameters e βn; 6. Wald 95% confidence interval for an exponentiated model parameter.