TITLE

Causes of death and renal tubular dysfunction in residents exposed to cadmium in the environment

AUTHOR(S)
Nishijo, M.; Morikawa, Y.; Nakagawa, H.; Tawara, K.; Miura, K.; Kido, T.; Ikawa, A.; Kobayashi, E.; Nogawa, K.
PUB. DATE
August 2006
SOURCE
Occupational & Environmental Medicine;Aug2006, Vol. 63 Issue 8, p545
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Objectives: To clarify the causes of death of residents with renal tubular dysfunction induced by cadmium (Cd) in the environment. Methods: A 15 year follow up study was performed with the inhabitants living in the Cd polluted Kakehashi River basin in Japan. Standardised mortality ratios (SMRs) for causes of death, classified by ICD-9, were computed using the person-years method to investigate the excess mortality of subjects with urinary β2-MG (microglobulin) ⩾1000 μg/gCr. Mortality risk analysis was performed using Cox's proportional model to compare mortality between subjects with urinary β2-MG ⩾ 1000 and <1000 μg/gCr, and to investigate the relationship between the degree of urinary β2-MG and mortality. Results: Excess mortality due to heart failure and cerebral infarction in both sexes, and nephritis and nephrosis in men, was observed among subjects with urinary β2-MG ⩾1000 μg/gCr. Significant increases in mortality risk for cerebral infarction in men and for malignant neoplasms in women with urinary β2-MG ⩾ 1000 μg/gCr were observed during the first five year observation period. For nephritis and nephrosis, the mortality risks for men and women with urinary β2-MG ⩾ 1000 μg/gCr significantly increased over the 15 year observation period. The mortality risks for heart failure and cerebral infarction increased in proportion to the increased urinary β2-MG in both sexes. Increased mortality risks for nephritis and nephrosis were identified in the subjects with urinary β2-MG ⩾ 10000 μg/gCr in both sexes. Conclusion: Renal tubular dysfunction induced by Cd affected the causes of death, and mortality for heart failure, cerebral infarction, and nephritis and nephrosis was increased among inhabitants living in a Cd polluted area in Japan. In women, cancer mortality may have been increased while Cd pollution was ongoing.
ACCESSION #
21928303

 

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