Explain the summary of morbidity  in CAD?

i) The prevalence of CAD among immigrant Indians is about three-fold higher than in comparable indigenous populations;
ii) CAD tends to occur earlier in life among people of Indian descent;
iii) The process is very severe, different, extensive often involving multiple vessels and runs an accelerated malignant course; and
iv) Morbidity attributable to CAD is substantially higher among Indian immigrants across all age groups and is remarkably pronounced in the young.