Table 4. Comparative prevalence of risk-associated and risk-lowering blood group phenotypes among Botswana, Northern India and Caucasian ethnicities.

Antigen	Prevalence of antigen in
	Botswana (This study)	Other Blacks	Northern India	Caucasians
C	29.7%	27%	85%*	68% ***
E	21.2%	22%	17.9%***	29% **
Jka	51.4%	92%***	82.65%***	76% ***
Lub	67.8%	92%***	96.8***	99.8%***
P1	74.6%	94% ***	67.2%	79%

Significance levels:

* P<0.05

** P<0.01

***P<0.001