Table 4.

Details of meta-regression of slope coefficients for in-hospital mortality

	Number of studies	Coefficient (95% CI)	P value
Age of patient	18 [2-4,19,21,31-43]	−0.0417 (−0.0680 to −0.0154)	0.002
Publication year	18 [2-4,19,21,31-43]	−0.1056 (−0.2103 to −0.0009)	0.048
Admission Hb	9 [2-4,21,38-42]	−0.1848 (−0.4343 to 0.0648)	0.147
Units transfused	12 [2,3,19,21,31,32,35-37,42,43]	−0.1676 (−0.3856 to 0.0504)	0.132
Pretransfusion Hb	7 [2-4,21,34,42,43]	−0.2157 (−0.8588 to 0.4275)	0.511
APACHE II	8 [2-4,21,34,38,40,42]	0.0202 (−0.0569 to 0.0973)	0.607

APACHE II, acute physiology and chronic health evaluation II; CI, confidence interval; Hb, hemoglobulin.