British Poultry Science · 1998 · 170 citations · 12 references
AgricultureAnimal SciencesPoultry ScienceBroiler ProductionPoultry HealthPoultry PathologyBroiler BreedingBroiler BreedsBroiler Disease PreventionBroiler Health ManagementBroiler Stocking DensityPoultry Production DiseasesBroiler Flock Health MonitoringBroiler Production Disease EpidemiologyBroiler Production ManagementCross-sectional Incidence StudyErythematous Foot DermatitisFootpad Lesion ScoringStocking Density Effects
1. A cross-sectional observational study was carried out to investigate spatial, temporal and management aspects of foot-pad dermatitis in Swedish broilers. The efficacy of a control programme was evaluated. 2. Flock information on producer, breed, foodstuff manufacturer, region, abattoir, date of slaughter, age at slaughter, planned and actual stocking density was recorded. A total of 6988 flocks, representing approximately 110 million broilers was examined. A total of 175 broiler producers from 15 geographical regions is represented. 3. The total foot-pad score per flock ranged from 0 to 200, with a mean of 34.7 and a standard deviation of 40.9. 4. Simple linear regression analysis showed that the mean total score on a weekly basis decreased (P < 0.001) over time, mainly because of a decrease in the prevalence of severe foot-pad lesions. 5. There was an association (P < 0.05) between slaughterhouse, foodstuff supplier and geographic region respectively and the mean total foot pad score of the flocks slaughtered.
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Practical Statistics for Medical Research.
Sophie Walter, Daniel Altman · Biometrics · 1992 · 11.7K citations