Urinary beta 2-microglobulin concentration and mortality in a cadmium-polluted area

Arch Environ Health. Nov-Dec 1993;48(6):428-35. doi: 10.1080/00039896.1993.10545965.

Abstract

A 9-y follow-up study of 3,178 persons who lived in a cadmium-polluted area was conducted to assess the influence of environmental cadmium exposure on long-term outcome. The standardized mortality ratios of the urinary beta 2-microglobulin-positive subjects (> 1,000 micrograms/g creatinine) of both sexes were higher than those of the general Japanese population, whereas the cumulative survival curves were lower than those of the urinary beta 2-microglobulin-negative group. A significant association was also found between urinary beta 2-microglobulin and mortality, using a Cox's proportional hazards model. Moreover, mortality rates increased in proportion to increases in the amount of urinary beta 2-microglobulin excreted. These results suggest that the prognosis for cadmium-exposed subjects with proximal tubular dysfunction is unfavorable. The mortality rate tended to become higher as the severity of renal dysfunction progressed.

MeSH terms

  • Aged
  • Aged, 80 and over
  • Cadmium Poisoning / epidemiology
  • Cadmium Poisoning / mortality
  • Cadmium Poisoning / urine*
  • Environmental Exposure
  • Female
  • Follow-Up Studies
  • Humans
  • Japan
  • Male
  • Middle Aged
  • Prognosis
  • Sex Factors
  • beta 2-Microglobulin / urine*

Substances

  • beta 2-Microglobulin