3. Number of platelet transfusions and number of platelet units.

Study	Intervention	Number of participants in each arm	Number of platelet transfusions/participant	Comparison statistics	P value	Number of platelet units transfused/participant	Comparison statistics	P value
Short‐term follow‐up (up to 30 days)
Diedrich 2005	< 10 x 109/L	79	Median 4; range 0 to 32	Not reported	< 0.001	Not reported	Not reported	Not reported
	< 30 x 109/L	87	Median 10; range 0 to 48			Not reported	Not reported
Heckman 1997	≤ 10 x 109/L	37	Mean 8.4 ± SD 5.3*	MD ‐3.00, 95% CI ‐5.76 to ‐0.24*	Not reported	Not reported	Not reported	Not reported
	≤ 20 x 109/L	41	Mean 11.4 ± SD 7.1*			Not reported	Not reported
Rebulla 1997	< 10 x 109/L	135	Mean 7.05 ± SD 4.56	MD ‐1.92, 95% CI ‐3.12 to ‐0.72	0.001	Not reported	Not reported	Not reported
	< 20 x 109/L	120	Mean 8.97 ± SD 5.17			Not reported	Not reported

*unpublished data provided by the author. The paper provided medians and ranges median 7 (5 to 11) for the standard‐trigger arm and median 11 (6 to 15) for the higher‐trigger arm.

CI = confidence interval

MD = mean difference

SD = standard deviation