Faye B, Fayet J C, Brochart M, Barnouin J, Paccard P
Ann Rech Vet. 1986;17(3):265-86.
The calculation of pathological association ratio (or relative risk) from two ways contingency tables, allowed to show numerous interrelationships between diseases of 1,205 dairy cows. The analysis concerns the animal during productive life, the lactation (all lactation mixed), a particular one (1st, 2nd, 3rd and more) and the beginning of productive life of cow (three first lactations). The relationships are discussed according to the level of calculation (animal, lactation, or beginning of life). There is some triangular relations: calving trilogy (dystocia-stillbirth-retained placenta), infectious trilogy (foul of the foot-metritis-mastitis), metabolic trilogy (appetite disorders-ketosis-digestive disorders), foot disorders trilogy (lameness-non infectious diseases of foot-foul of the foot). These pathological groups seem to depend from common risk factors (climate-feeding-cowshed hygiene-control of heat-age-culling policy-genetic factors-anatomical or physiological predisposition, animal size...), but, numerous interactions between groups are also shown, leading to consider pathology in farm like a complex entity.
通过双向列联表计算病理关联率（或相对风险），能够揭示1205头奶牛疾病之间的众多相互关系。分析涉及奶牛整个生产期、泌乳期（所有泌乳期混合）、特定泌乳期（第1、2、3及更多泌乳期）以及奶牛生产期开始阶段（前三个泌乳期）。这些关系根据计算水平（动物、泌乳期或生命开始阶段）进行讨论。存在一些三角关系：产犊三部曲（难产-死胎-胎盘滞留）、感染三部曲（蹄部疾病-子宫内膜炎-乳腺炎）、代谢三部曲（食欲紊乱-酮病-消化紊乱）、蹄部疾病三部曲（跛行-蹄部非传染性疾病-蹄部疾病）。这些病理组似乎取决于共同的风险因素（气候-饲养-牛舍卫生-热应激控制-年龄-淘汰政策-遗传因素-解剖或生理易感性、动物体型……），但是，也显示出各病理组之间存在众多相互作用，这使得我们将农场中的病理学视为一个复杂的整体。
