Table 4.
Race/ethnicity | Proportionala, n | Plannedb, n | Relative recruitmentc, n |
Hispanic | 96 | 115 | 1.2 |
White | 311 | 125 | 0.4 |
African American/black | 141 | 155 | 1.1 |
Asian | 35 | 50 | 1.5 |
American Indian or Alaska Native | 2 | 50 | 25.6d |
Native Hawaiian/Other Pacific Islander | 1 | 50 | >100.0d |
Multiracial | 14 | 55 | 3.8d |
Total | — | 600 | — |
aProportional recruitment is determined by multiplying the estimated proportion of all AMSM in the four regions by the total study enrollment (N=600).
bPlanned enrollment is an empirically determined set of requirement targets.
cRelative recruitment is the ratio of the planned/proportional recruitment numbers, representing the relative under- or overrepresentation of the population in the planned sample, relative to their representation in the overall population of the study areas.
dThese relative recruitment values are calculated from proportional recruitment numbers with more precision than those displayed in the proportional column (eg, for Native Hawaiian/Other Pacific Islander, the proportional sample is calculated as 0.0016 person, but it is depicted as 1 since fractional recruitment of participants is not possible) . Therefore, the relative recruitment differs from the simple ratio of the planned to proportional for these groups.