Cancer incidence in the native peoples of far eastern Siberia.

Cancer incidence rates were examined in the native peoples of the far north-east of Siberia for the years 1977-1988. Particularly high rates of cancers of the stomach, lung, oesophagus and cervix were observed. For stomach cancer, the male and female age-standardized (to the world population) rates were 103.

Oesophageal cancer in the Republic of Karakalpakstan.

Regional and temporal patterns of variation in the incidence of cancer of the oesophagus in the Central Asian republic of Karakalpakstan were analysed. Karakalpakstan (population about 1200,000) is an area with high rates of this disease. Incidence data within regions (data from 1988-1989), ethnic groups (data from 1987-1989) and calendar periods (data from 1973-1987) were available for analysis, with corresponding official population estimates.

[Increased risk factors for the occurrence of bladder cancer].

Risk factors of bladder cancer development were studied in a population-based case-control epidemiological study performed in Moscow. Relative risk (RR) indexes appeared to be increased in smokers (4.2) and ex-smokers (3.