“基准”——安大略省肉牛育种牛群的大型观察性研究：研究设计与数据收集
"Benchmark" - a large observational study of Ontario beef breeding herds: Study design and collection of data.
作者信息
McDermott J J, Alves D M, Anderson N G, Martin S W
出版信息
Can Vet J. 1991 Jul;32(7):407-12.
The methods used in a large field study which investigated the health and productivity of Ontario beef breeding herds are described. Beginning in the calving season of 1986, 180 breeding herds on 170 randomly sampled farms were followed for a two year period, using producer records and annual farm visits.The response (cooperation) rate among the eligible producers initially contacted was 70%. Approximately two-thirds of producers maintained individual animal records, primarily calving season records. Approximately 40% recorded disease occurrences.The advantages, disadvantages, and interpretation of "on-farm" observational studies are discussed.
本文描述了一项大型实地研究中所采用的方法，该研究调查了安大略省肉牛繁育牛群的健康状况和生产性能。从1986年产犊季节开始，对170个随机抽样农场的180个繁育牛群进行了为期两年的跟踪，采用了生产者记录和每年的农场走访。最初联系的符合条件的生产者中的回应（合作）率为70%。大约三分之二的生产者保存了个体动物记录，主要是产犊季节记录。大约40%的生产者记录了疾病发生情况。讨论了“农场内”观察性研究的优点、缺点及解读。
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