
Across-section study had been carried-out in 9 enterprises which had air-condition central system. 1478 enviromental factors were measured and 1571 workers were examined health enclosing. The result showed: the rate of environmental physical factors, chemical factors and microorganise polluted in air over OELs (occupational exposure limits) were 14.3 percent; 9.8 percent and 9.9 percent respectively. The rate of SBS was 28.9 percent and at least one of SBS's symtoms was 64.4 percent. Female had been SBS higher than male; workers in air-condition room had been SBS higher than workers out side with p0.05. The officers workers in air-condition had rate of SBS highest. The increasing SO2 or NOx content in air closed-relative the increasing of rate SBS in workers with p0.05. 91 percent air-condition systems in enterprises were not good.
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