Table 3.

PLT transfusion analysis between the case and control groups

PLT transfusion parameters	Case group, n = 178	Control group, n = 178	p value	Effect size, r
Infants receiving transfusion, n (%)	69 (39)	32 (18)	<0.001	0.23
Transfusions per infant	2	3	0.776	0.03
Transfusion volume, mL	27.5 (12.5–63.2)	31.1 (12.5–64.6)	0.710	0.04
Timing of 1st transfusion (postnatal age in days)	5	4	0.205	0.13

PLT, platelet. The median is shown for transfusion analysis; the value in parentheses reflects the interquartile range.