Table 1.

NIH Enrollment Table based on WHI mapped Form 41 data

Racial Categories	Ethnic Categories									Total
	Not Hispanic or Latino			Hispanic or Latino			Unknown/Not Reported Ethnicity
	Female	Male	Unknown/ Not Reported	Female	Male	Unknown/ Not Reported	Female	Male	Unknown/ Not Reported
American Indian/ Alaskan Native	292	0	0	53	0	0	195	0	0	540
Asian	3216	0	0	60	0	0	749	0	0	4025
Native Hawaiian or Other Pacific Islander	119	0	0	18	0	0	0	0	0	137
Black or African American	14,166	0	0	160	0	0	1	0	0	14,327
White	133,321	0	0	4300	0	0	7	0	0	137,628
More than one Race	1662	0	0	211	0	0	7	0	0	1880
Unknown or Not reported	341	0	0	2510	0	0	420	0	0	3271
Total	153,117	0	0	7312	0	0	1379	0	0	161,808

Coding instructions

1). Column categories: use Form 41 imputed Question 1 (Ethnicity); combine ‘Yes, Puerto Rican’, ‘Yes, Mexican, Mexican American, or Chicano’, ‘Yes, Cuban’ and

‘Yes, other Spanish/Hispanic/Latino’ into ‘Hispanic/Latino’.

Row categories: count the number of race categories marked in Question 2 (Race); If number of race categories is greater than one, category = ‘More than one race’; else if number of race categories equals one, use categories for American Indian/Alaskan Native, White, Black or African American as is, and create aggregated categories for Asian = Asian Indian or Chinese or Filipino or Japanese or Korean or Vietnamese or Other Asian, and Native Hawaiian or Pacific Islander = Native Hawaiian or Guamanian/Chamorro or Samoan or Other Pacific Islander.