Table III.

Univariate and multivariate analysis of overall survival in elderly patients with refractory acute myeloid leukemia.

	Univariate survival analysis		Multivariate survival analysis
Variable	Risk ratio (95% CI)	P-value	Risk ratio (95% CI)	P-value
Gender	1.069 (0.391–2.923)	0.896	0.502 (0.014–17.64)	0.704
Age	0.999 (0.938–1.064)	0.975	1.245 (0.978–1.584)	0.075
White blood cell	1.117 (1.033–1.208)	0.006	1.266 (1.017–1.576)	0.035
Platelet count	0.995 (0.987–1.004)	0.303	0.945 (0.893–0.995)	0.033
Hemoglobin	0.983 (0.961–1.005)	0.136	1.036 (0.926–1.160)	0.534
Bone marrow blasts	1.017 (0.999–1.036)	0.058	1.161 (1.003–1.343)	0.046
Peripheral blood blasts	1.021 (1.001–1.041)	0.039	0.881 (0.783–0.991)	0.035
Total bilirubin	1.025 (0.999–1.052)	0.059	0.943 (0.875–1.02)	0.126
Creatinine	0.982 (0.942–1.023)	0.392	1.112 (1.005–1.223)	0.039
PTEN positive	0.372 (0.123–1.117)	0.078	0.000 (0.913–31.81)	0.056
CD44 positive	6.281 (1.784–22.12)	0.004	30.69 (0.000–0.208)	0.019

^aCI, confidence interval.