@article { author = {Bahonar, Alireza and Sharifi, Hamid and Bokaie, Saied and Vodjgani, Mehdi and Rahimi Foroushani, Abbas and Haghdoost, Ali Akbar}, title = {Modeling the Effect of Lameness on Culling of Dairy Cows in Tehran Province}, journal = {Iranian Journal of Veterinary Surgery}, volume = {04}, number = {1-2}, pages = {37-44}, year = {2009}, publisher = {Iranian Veterinary Surgery Association (IVSA)}, issn = {2008-3033}, eissn = {2676-6299}, doi = {}, abstract = {Objective-To assess the effect of lameness on culling of dairy cows in Tehran province.Design- Historical cohort study.Study population and procedures- 7067 first- and second-parity Holstein dairy cows that calved from March, 21 2007 to March, 20 2008 were until next calving or culling. Logistic regression was conducted data.Results-The overall lactational culling rate for eligible cows in the study was 22.09% (95% CI: 19.26-24.9%). Lameness was an important factor in the model and increased odds of culling (OR= 1.32; 95% Confidence interval = 1.15-1.51). Moreover, parity, 60-day cumulative milk yield, and herd size increased culling odds. We did not find evidence for a significant effect of calving season on culling.Conclusion- Lameness is an important factor in culling decision in dairy herds in this area.}, keywords = {Culling,dairy cow,logistic regression,Tehran Province}, url = {https://www.ivsajournals.com/article_3153.html}, eprint = {https://www.ivsajournals.com/article_3153_492ea83024746e389c384e621643fbf2.pdf} }