Table 2.

Prognostic score for patients with intermediate risk myelodysplastic syndrome (0–4 score).

Variable	Coefficient	HR (95% CI)	p	Score	No. Patients
* Age ≥ 66 years
No				0	143
Yes	0.87	2.43 (1.74–3.38)	<0.001	2	152
* Peripheral blood blasts ≥ 2%
No				0	247
Yes	0.52	1.69 (1.14–2.50)	0.009	1	48
Red blood cell transfusion
No				0	199
Yes	0.51	1.66 (1.18–2.32)	0.003	1	96

Score were obtained by dividing each coefficient by 0.51 (smallest coefficient) and rounding each results to the nearest integer and changing the results to the absolute value.

^*Based on CART. CART = Classification and Regression Tree analysis. CART analysis for failure time data uses the martingale residuals of a Cox model to calculate (approximate) chi-square values for all possible cut point on all the CART covariates. Coefficient, HR, and p are given for reduced model using backward elimination methods as described. Complete univariate and multivariate analysis are included in supplemental Table S