Table 4 Details of meta-regression of slope coefficients for in-hospital mortality

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