Senthilselvan A, Dosman J A, Semchuk K M, McDuffie H H, Cessna A J, Irvine D G, Crossley M F, Rosenberg A
Centre for Agricultural Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Can Respir J. 2000 Jul-Aug;7(4):320-5. doi: 10.1155/2000/635046.
To assess the changes in respiratory health from winter to summer seasons in a rural population.
A longitudinal design was used in the study.
A population-based study was conducted as part of the Environmental Pesticide Exposure and Human Health component of the Prairie Ecosystem Study (PECOS) in southwestern Saskatchewan.
In the winter season, 358 patients participated in the study. Of these patients, 234 returned for the second assessment during the summer season. After excluding 34 children aged 17 years and under, 200 adult patients were available for analysis.
Questionnaires were used to obtain information on demographic factors, smoking habits, occupational and environmental exposures, and respiratory conditions. Pulmonary function measurements were obtained using a volume displacement spirometer.
Mean ages (+/- SD) of the 106 men and 94 women participating in the study were 50.1+/-13.3 and 49.0+/-13.1 years, respectively. Mean percentage changes in maximal midexpiratory flow rate from winter to summer assessments indicated an improvement for town residents and a decline for farm residents. Mean percentage changes in the ratio of forced expiratory volume in 1 s to forced vital capacity indicated an improvement for town residents who were not engaged in farming, and increasing declines for town residents engaged in farming, farm residents not engaged in farming and farm residents engaged in farming.
Seasonal changes occurred in measurements of pulmonary function between winter and summer seasons; these changes may be related to the environmental or occupational exposures experienced by the participants during the study.
评估农村人口从冬季到夏季呼吸健康状况的变化。
本研究采用纵向设计。
作为萨斯喀彻温省西南部草原生态系统研究（PECOS）中环境农药暴露与人类健康部分的一项基于人群的研究。
冬季有358名患者参与研究。其中，234名患者在夏季返回进行第二次评估。排除34名17岁及以下儿童后，有200名成年患者可供分析。
通过问卷获取人口统计学因素、吸烟习惯、职业和环境暴露以及呼吸状况等信息。使用容积式肺量计进行肺功能测量。
参与研究的106名男性和94名女性的平均年龄（±标准差）分别为50.1±13.3岁和49.0±13.1岁。从冬季到夏季评估，最大呼气中期流速的平均百分比变化表明城镇居民有所改善，而农场居民则有所下降。1秒用力呼气容积与用力肺活量比值的平均百分比变化表明，不从事农业的城镇居民有所改善，从事农业的城镇居民、不从事农业的农场居民和从事农业的农场居民的下降幅度则不断增加。
冬季和夏季之间肺功能测量出现季节性变化；这些变化可能与研究期间参与者所经历的环境或职业暴露有关。
