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© 1992 Oxford University Press

other

Oesophageal Cancer in the Republic of Karakalpakstan

D G ZARIDZE*, T BASIEVA*, M KABULOV**, N E DAY{dagger} and S W DUFFY{dagger}

*Department of Cancer Epidemiology and Prevention, Institute of Carcinogenesis, All-Union Cancer, Research Center, The USSR Academy of Medial Sciences 24 Kashirskoe Shosse, 115478, Moscow, USSR
**Cancer Research Institute, The Uzbek Ministry of Health, Djumanazarova ul. 742005. Nukus, USSR
{dagger}MRC, Biostatistics Unit 5 Shaftesbury Road, Cambridge CB2 2BW, UK

Zaridze D G (Department of Cancer Epidemiology and Prevention, Institute of Carcinogenesis, All-Union Cancer Research Center, The USSR Academy of Medical Sciences, 24 Kashirakoe Shosse, 115478, Moscow, USSR), Basieva T, Kabulov M, Day N E and Duffy S W. Oesophageal cancer in the republic of Karakalpakstan. Intemationai Journal of Epidemiology 1992; 2l: 643–648.

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 1987–1989), ethnic groups (data from 1987–1989) and calendar periods (data from 1973–1987) were available for analysis, with corresponding official population estimates. No significant difference was observed between rates in urban and rural environments, although significant regional variation was obsarved (P < 0.05). The highest rate observed was in the Muinak, the northem region, with world age-standerdized rates (ASR) of 125.96 for males and 150.65 for females. There was a very significant difference among ethnic groups (P < 0.001). The ethnic group with the highest incidence was the Kazakh people, with an ASR of 68.0 in males and 86.3 in females. lncidence in the republic as a whole declined in the period from 1973 to 1987. Incidence of cancer of the oesphagus is still high in Karakalpakstan, despite the decline. Incidence is likely to be strongly related to factors associated with region of residence and with ethnicity.

Received 1 January 1992


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