When looking at ferritin measured at the first return after low Hb deferral, white < black or mixed race < asian.

When looking at all visits with ferritin measured, black < mixed race < asian < white

coef on "white vs other" is very significant, moreso than "black vs other", which makes sense given that mixed race and asian are < than black

So regression shows logferr, low to high, is white < black ~< mixed race < asian (`~< is not statistically significant)

4 groups (Active/non-active by femaleMenstruating vs not), 45*4 = 180 participants assuming equal representation of all groups, ignoring race

Would expect the ESS to drop below threshold before being replenished at 1,000. could be issueiwth the timing, within the loop, of when ESS is recorded vs. reset. Would check ESS at beginning.