title: [The precursors of N-nitroso compounds in the drinking water and digestive system malignancy morbidity rates in Tashkent].
abstract: The authors have studied a correlation between the intake of the precursors of N-nitroso compounds from drinking water in Tashkent residents and the digestive malignancy morbidity rates. With the average urban value of 4.1-6.6 mg/l, the drinking water levels of nitrates are found to vary in different administrative districts of Tashkent: the highest values (range 73-20.3 mg/l) are annually recorded in the Khamzin and Yakkasaray districts and the lowest ones (1.0-1.4 mg/l) in the Yunusabad, Shaikhantakhur, Mirzo-ulugbek, and Uchtepin districts. There is a direct average correlation (r = 0.5-0.6) between the intake of nitrates and the digestive malignancy morbidity rates in the majority of administrative districts of the city and a high one (r = 0.7-0.9) when the values are compared, by taking into account the 3-5 year delay effect.
authors.forename: Iu Iu
authors.initials: IuIu
authors.lastname: Assesorova
authors.forename: L A
authors.initials: LA
authors.lastname: Ponomareva
authors.forename: G V
authors.initials: GV
authors.lastname: Kireev
authors.forename: I B
authors.initials: IB
authors.lastname: Boĭko
mesh_terms: D002947:Cities; D004067:Digestive System Neoplasms / Q000139:chemically induced / Q000453:epidemiology*; D006801:Humans; D009017:Morbidity / Q000639:trends; D009603:Nitroso Compounds / Q000032:analysis / Q000633:toxicity*; D014610:Uzbekistan / Q000453:epidemiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*; D014881:Water Supply / Q000032:analysis / Q000592:standards*
chemical_list: D009603:Nitroso Compounds; D014874:Water Pollutants, Chemical