A FOLLOW-UP-STUDY OF THE GRAIN ELEVATOR WORKERS IN THE PORT OF VANCOUVER
A FOLLOW-UP-STUDY OF THE GRAIN ELEVATOR WORKERS IN THE PORT OF VANCOUVER
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DOI：
10.1080/00039896.1981.10667610
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发表时间：
1981-01-01
期刊：
影响因子：
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通讯作者：
GRZYBOWSKI, S
中科院分区：
文献类型：
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作者：
CHANYEUNG, M;SCHULZER, M;GRZYBOWSKI, S
在第一次健康调查 2.5 年后，对温哥华港的 587 名谷物升降机工人和 111 名文职人员进行了第二次呼吸系统调查。尽管第二次调查期间粮仓内粉尘浓度较低，但第二次调查中粮仓工人的呼吸道症状和肺功能检查结果与第一次健康调查几乎相同。对396名粮食工人的纵向研究表明，在两次调查期间有相同吸烟习惯的工人中，第二次健康调查期间呼吸道症状的患病率略有上升。在第一次调查中出现呼吸道症状或肺功能受损的吸烟者中，23.5%戒烟；这些工人的咳嗽和咳痰的发生率有所下降。粮食工人的年度功能下降比文职工人更大，尤其是 50 岁以上的工人，此时两个工作组之间 1 秒用力呼气量 (FEV1.0) 和最大呼气中段流量 (MMF) 的年度下降差异具有统计学意义。对于两个工作组来说，肺功能的年度下降与年龄和吸烟显着相关。吸烟者的肺功能下降幅度比不吸烟者更大，而老年工人的肺功能下降速度更快。 FEV1.0、FVC[用力肺活量和MMF]与年龄之间的关系是二次关系而不是线性关系。在粮食工人中，肺功能的下降与初始肺功能、呼吸道症状的存在、特应性状态或暴露时间无关。它与 1 个轮班和 1 个工作周期间肺功能的急性变化相关。谷物粉尘对工人的肺功能有有害影响。它不应被视为令人讨厌的灰尘。
A 2nd respiratory survey was conducted on 587 grain elevator workers in the Port of Vancouver and on 111 civic workers, 2.5 yr after the 1st health survey. The prevalence of respiratory symptoms and lung function findings among grain elevator workers in the 2nd survey were almost identical with those in the 1st health survey, even though the dust concentration was lower in the elevators during the 2nd survey. The longitudinal study in 396 grain workers showed that the prevalence of respiratory symptoms increased slightly during the 2nd health survey among workers who had the same smoking habits during both surveys. Of smokers who had respiratory symptoms or lung function impairment in the 1st survey, 23.5% gave up smoking; the prevalence of cough and sputum production decreased among these workers. The annual decline in function was greater for grain workers than civic workers particularly among workers over age 50 yr when the differences in annual decline in forced expiratory volume in 1 s (FEV1.0) and maximal mid-expiratory flow rate (MMF) between the 2 work groups became statistically significant. The annual decline in lung function was significantly correlated with age and smoking for both work groups. Cigarette smokers had a greater decline in lung function than nonsmokers and older workers showed a more rapid decline in lung function. The relationship between FEV1.0, FVC [forced vital capacity and MMF with age was quadratic rather than linear. Among grain workers the decline in lung function was not correlated with initial lung function, presence of respiratory symptoms, atopic status or duration of exposure. It was correlated with acute changes in lung function over the course of 1 work shift and 1 work wk. Grain dust had deleterious effects on the lung function of the workers. It should not be regarded as a nuisance dust.