5. Duration of hospital stay.

Study	Intervention (transfusion threshold)	Number of participants in each arm	Number of days in hospital (median)	P value
Diedrich 2005	< 10 x 109/L	79	23 Range 9 to 89	Not significant
	< 30 x 109/L	87	23 Range 14 to 140
Heckman 1997	≤ 10 x 109/L	37	38 IQR 30 to 42	0.25*
	≤ 20 x 109/L	41	32 IQR 27 to 45
Rebulla 1997	< 10 x 109/L	135	29 Range 3 to 64	Not reported
	< 20 x 109/L	120	28 Range 4 to 54

*unpublished data provided by the author.

IQR = interquartile range