. Author manuscript; available in PMC: 2019 Oct 1.

Published in final edited form as: Eur J Haematol. 2018 Aug 31;101(4):532–541. doi: 10.1111/ejh.13140

Table 6.

Cox regression model for survival and predictors of mortality (N=176)

	Hazard Ratio (95% CI)	p value
Gender (male)	6.47 (1.24, 33.88)	0.02
Age (years)	1.06 (0.97, 1.16)	0.22
Haemoglobin (g/dL)	0.55 (0.37, 0.84)	0.005
Exercise capacity^{^}	0.98 (0.85, 1.13)	0.82
Abnormal pulmonary function test	1.04 (0.22, 4.86)	0.96

CI: confidence interval

^{^}

Exercise capacity defined by the duration on treadmill in minutes

Note: Sickle cell genotype (SS or S/β⁰ thalassemia) is not included in the model because patients with non-SS or S/β⁰ thalassemia had no deaths, and so the model does not converge to a stable solution.