帯広畜産大学 学術情報リポジトリ >
060畜産フィールド科学センター >
06001学術雑誌論文 >

このアイテムの引用には次の識別子を使用してください: http://ir.obihiro.ac.jp/dspace/handle/10322/4443

タイトル: Risk factors for stillbirths and mortality during the first 24 h of life on dairy farms in Hokkaido, Japan 2005-2009
著者: Kayano, M.
Kadohira, M.
Stevenson, M. A.
キーワード: Japan
Peri-natal mortality
Dairy
Multilevel modelling
Epidemiology
発行日: 1-May-2016
出版者: Elsevier
誌名: Preventive Veterinary Medicine
巻: 127
開始ページ: 50
終了ページ: 55
抄録: This was a retrospective cohort study using data from the insurance scheme provided by the Japanese Mutual Aid Association (NOSAI). The population of interest comprised all cattle born on NOSAI-client farms in the Japanese prefecture of Hokkaido, Japan for the period 1 April 2005-31 March 2009. The outcome of interest was whether or not at least one calf was stillborn, had died during delivery or died during the first 24 hours of life for a given calving event, termed first 24h mortality risk. A mixed-effects logistic regression model was developed to identify explanatory variables associated with first 24h mortality risk. The final data set comprised details of 1,281,737 calving events on a total of 5172 dairy herds from 19 NOSAI branches located throughout the prefecture of Hokkaido. Throughout the study period 7.68 (95% CI 7.64-7.73) of every 100 calving events had at least one calf that was either stillborn, dead at the time of delivery or dead during the first 24 h of life. Factors that were positively associated with an increase in first 24 h mortality risk included delivery during the colder months of the year (November-March), being of Wagyu breed, having a multipara dam, multiple (as opposed to single) birth deliveries, and delivery in larger herds. After adjusting for the fixed effects included in our multilevel model, 89% of the unexplained variation in first 24h mortality risk was at the calving event level. We propose that the data recording requirements of the NOSAI scheme are extended to include details of calving events (e.g. the presence or absence of dystocia) and details of the way in which calves are managed post delivery. This would allow more subtle risk factors for calf mortality to be identified which, in turn, will lead to refinement of recommendations for calf management during the first 24h of life in this area of Japan.
URI: http://ir.obihiro.ac.jp/dspace/handle/10322/4443
DOI: info:doi/10.1016/j.prevetmed.2016.03.012
ISSN: 0167-5877
権利情報: This accepted manuscript is licensed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. <http://creativecommons.org/lisenses/by-nc-nd/4.0/>
出現コレクション:06001学術雑誌論文

このアイテムのファイル:

ファイル 記述 サイズフォーマット
1-s2.0-S0167587716300976-main.pdf346.75 kBAdobe PDF見る/開く

このリポジトリに保管されているアイテムはすべて著作権により保護されています。

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2006 MIT and Hewlett-Packard - ご意見をお寄せください