Table 4.

Transfusions according to birth weight

Variable	Birth weight		P value
	<1,000 g (n=58)	1,000–1,500 g (n=51)
Hemoglobin at first transfusion (g/dL)	8.5±1.4	8.1±0.9	0.081
Age at first transfusion (day)	22.1±16.6	32.6±15.2	0.001
Number of transfusions	3.1±2.2	1.5±0.8	<0.001

Values are presented as mean±standard deviation.

The P values were calculated by Student t test for continuous variables.

Boldface indicates a statistically significant difference with P<0.05.