In Africa, coronary heart disease (CHD) is near absent in rural areas,
and very uncommon in urban centres, where many Africans are in an adv
anced stage of transition. Among town dwellers intakes of food, especi
ally fat, have risen and intakes of fibre-containing foods have fallen
. Mean serum cholesterol level is almost double that of rural populati
ons living traditionally. Obesity in females has risen enormously. Pre
valence of hypertension exceeds that in the white population. The same
applies to the practice of smoking in males, but not in females. The
level of physical activity has fallen generally. With these increases
in risk factors we can expect urban Africans to attain the high mortal
ity rate for CHD now experienced by Afro-Americans. Prevention by urgi
ng reversion to previous life-style behaviour is a non-starter. Howeve
r, as long as Africa remains impoverished, a major rise in CHD is unli
kely.