The Kadazan people of Sabah have more cases of cancer of the pharynx than those living around them. Breast cancer seems to pose a bigger threat to Caucasian women than to those of other races. Among the whites in the United States, there are 73.5 cases per 100,000 population, while in Japan there are just 13.9 cases per 100,000. Additionally, research by Professor A. Habibi of Teheran University has given strength to the suspicion that this form of cancer attacks persons of a higher social level more frequently than it does the poorer people.

Stomach cancer is five times as high among the Japanese as it is among the Filipinos, while breast cancer is three times as high among the Caucasian women as it is among the Filipinos.