Chénard Liliane, Senthilselvan Ambikaipakan, Grover Vaneeta K, Kirychuk Shelley P, Lawson Joshua A, Hurst Thomas S, Dosman James A
Institute of Agricultural Rural and Environmental Health, University of Saskatchewan, Saskatoon, SK, Canada.
Chest. 2007 Jan;131(1):245-54. doi: 10.1378/chest.05-2238.
Swine farmers are exposed to a number of airborne contaminants associated with respiratory ill health.
To examine the factors associated with healthy worker effect in the swine industry from a longitudinal follow-up of farmers at 4 years and 13 years.
A prospective study of swine farmers and nonexposed rural residents was conducted using similar questionnaires and same spirometer at each time point.
In the original observations in 1990/1991, we studied 302 swine farmers and 261 nonfarming control subjects. Four years later in 1994/1995, 217 swine farmers and 171 nonfarming control subjects of the original group participated again. In 2003/2004, 163 swine farmers and 118 control subjects were retested. Of the 163 swine farmers, 52 remained active swine farmers and 111 were no longer swine farming, thus providing the opportunity to evaluate work continuity in the industry. Among farmers studied in 2003/2004, mean values for percentage of predicted FEV(1)/FVC ratio and forced expiratory flow between 25% and 75% of FVC were lower in those who had quit swine farming compared to those still swine farming and nonfarming control subjects. The herd size in the barn at baseline in 1990/1991 and at interim follow-up in 1994/1995 was a significant predictor of quitting swine farming. In addition, percentage of predicted FEV(1)/FVC at the interim observation was a significant predictor of quitting swine farming.
There is a significant healthy worker effect among swine farmers. The continuation of work in the facilities may be predicted by herd size and interim lung function.
养猪农户暴露于多种与呼吸道疾病相关的空气传播污染物中。
通过对农户进行4年和13年的纵向随访，研究养猪行业中与健康工人效应相关的因素。
对养猪农户和未接触的农村居民进行前瞻性研究，在每个时间点使用相似的问卷和同一台肺活量计。
在1990/1991年的原始观察中，我们研究了302名养猪农户和261名非务农对照对象。4年后的1994/1995年，原组中的217名养猪农户和171名非务农对照对象再次参与研究。2003/2004年，对163名养猪农户和118名对照对象进行了重新测试。在这163名养猪农户中，52人仍为活跃的养猪农户，111人不再从事养猪业，从而提供了评估该行业工作连续性的机会。在2003/2004年研究的农户中，与仍从事养猪业的农户和非务农对照对象相比，已停止养猪的农户预测FEV(1)/FVC比值百分比和FVC的25%至75%之间的用力呼气流量的平均值较低。1990/1991年基线时以及1994/1995年中期随访时猪舍中的猪群规模是停止养猪的一个重要预测因素。此外，中期观察时预测FEV(1)/FVC的百分比是停止养猪的一个重要预测因素。
养猪农户中存在显著的健康工人效应。设施内工作的持续性可通过猪群规模和中期肺功能来预测。
