TABLE 2.

Demographic determinants of blood donors (n = 13 317) who participated in the National Heart, Lung, and Blood Institute red blood cell Omics (RBC-Omics) study between 2013-2015

Race/ethnicity	No. of males	No. of females	Male BMI (mean ± SD)	Female BMI (mean ± SD)	P (sex)	Total no.	Total BMI (mean ± SD)
White	4304	4152	28.2 ± 5.0	27.5 ± 6.1	<0.001	8456	27.9 ± 5.6
Hispanic	406	613	28.7 ± 5.2	28.5 ± 6.2	0.56	1019	28.6 ± 5.8
African American	737	857	29.9 ± 6.7	30.2 ± 6.9	0.50	1594	30.1 ± 6.8
Asian	879	733	26.2 ± 3.9	24.9 ± 4.3	<0.001	1612	25.6 ± 4.1
Other	301	335	27.4 ± 4.8	27.6 ± 6.6	0.74	636	27.5 ± 5.8
Total	6627	6690	28.1 ± 5.2	27.7 ± 6.2	<0.001	13 317	27.9 ± 5.7

Note: P (sex) denotes sex differences in BMI.

Abbreviation: BMI, body mass index.