Exposure level of total N-nitroso compounds in residents of high-and low-risk areas for esophageal cancer in southern / 中华预防医学杂志
Chinese Journal of Preventive Medicine
;
(12): 386-389, 2002.
Article
in Chinese
| WPRIM
| ID: wpr-257244
ABSTRACT
<p><b>OBJECTIVE</b>To assess the exposure level of total N-nitroso compounds (TNOCs) in the residents of high- and low-risk areas for esophageal cancer in southern China.</p><p><b>METHODS</b>Samples of duplicate plate diets and 12 hr overnight urine were collected from 120 male adults in each of the 2 areas, a high-risk area (Nanao county) and a low-risk area (Lufeng county) for esophageal cancer. The 240 male healthy subjects (35 - 64 years old) were selected by a 3-stage random cluster sampling procedure. Levels of TNOC, N-nitrosamino acids (NAAs) and volatile N-nitroso compounds (VNOC) in the samples were measured by Thermo Energy Analyzer.</p><p><b>RESULTS</b>The detectable rate (95%) of diet TNOC, daily dietary TNOC intake (4.25 +/- 0.84) micromol/day, 12-hr urinary TNOC excretion levels (1.76 +/- 0.23 ng/12 h) and daily dietary intake of VNOC (266 +/- 31.2 microg/day) in the high-risk area were all significantly higher than those of the low-risk area. Oesophageal cancer mortality rates were positively and significantly associated with daily dietary TNOC intake and 12-hr urinary TNOC excretion. Urinary NAAs excretion levels were not different in the two areas.</p><p><b>CONCLUSION</b>The results suggest that TNOCs may be implicated in the etiology of esophageal cancer in southern China.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Urine
/
Esophageal Neoplasms
/
China
/
Mortality
/
Nitroso Compounds
Type of study:
Etiology study
/
Prognostic study
Limits:
Adult
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
Chinese
Journal:
Chinese Journal of Preventive Medicine
Year:
2002
Type:
Article
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