A Meta-Analysis to Understand the Relationship between Pig Body Weight and Variation from Birth to Market
Abstract
:Simple Summary
Abstract
1. Introduction
2. Materials and Methods
2.1. Literature Search
2.2. Selection for Inclusion and Exclusion Criteria
2.3. Data Base Preparation and Meta-Analysis
Publication | Trial | Sample Size | Group 2 | Average initial BW, kg | Average Final BW, kg | Average CV Start | Average CV End | Average SD Start | Average SD End | Reference |
---|---|---|---|---|---|---|---|---|---|---|
Peterson, 2004 3 | 1 | 3132 | 3 | 34.0 | 114.6 | 12.8 | 8.2 | 4.33 | 9.43 | [14] |
Peterson, 2004 3 | 2 | 3492 | 3 | 5.38 | 107.8 | 16.8 | 9.1 | 0.91 | 9.81 | [14] |
Main, 2004 | 1 | 2272 | 4 | 4.6 | 110.6 | 18.4 | 10.6 | 0.83 | 11.61 | [15] |
Main, 2004 | 2 | 3456 | 3 | 4.8 | 115.6 | 19.8 | 9.6 | 0.95 | 11.24 | [15] |
Fix, 2010 | 1 | 4108 | 1 | 4.92 | 103.12 | 23.78 | 13.18 | 1.17 | 13.60 | [16] |
Fix, 2010 | 2 | 1052 | 1 | 1.54 | 115.2 | 23.77 | 7.71 | 0.37 | 8.88 | [16] |
Beaulieu, 2010 | 1 | 1114 | 3 | 1.40 | 97.5 | 19.9 | 9.7 | 0.27 | 9.34 | [17] |
Shull, 2013 3 | 1 | 120 | 2 | 5.7 | 167.5 | 20.5 | 8.7 | 1.17 | 14.49 | [18] |
Shull, 2013 3 | 2 | 2240 | 7 | 5.8 | 175.8 | 19.8 | 9.4 | 1.15 | 15.82 | [18] |
Shull, 2013 3 | 3 | 918 | 2 | 1.44 | 135.3 | 21.2 | 10.1 | 0.30 | 13.55 | [18] |
Flohr, 2015 3 | 1 | 1092 | 4 | 36.3 | 138.4 | 14.9 | 7.2 | 5.41 | 9.96 | [19] |
Zotti, 2017 | 1 | 1178 | 5 | 1.36 | 20.7 | 20.4 | 16.12 | 0.28 | 3.34 | [20] |
Hastad, 2019 3 | 1 | 1032 | 2 | 30.7 | 118.3 | 15.6 | 12.5 | 4.80 | 14.78 | [21] |
Hastad, 2019 3 | 2 | 1176 | 2 | 35.2 | 118.7 | 15.9 | 9.7 | 5.58 | 11.53 | [21] |
Faccin, 2020 | 1 | 1176 | 4 | 6.1 | 21.5 | 20.2 | 19.1 | 1.25 | 4.10 | [22] |
Williams, 2020 | 1 | 1448 | 5 | 6.1 | 124.7 | 17.8 | 10.1 | 1.07 | 12.57 | [23] |
2.4. Statistical Analysis
3. Results
Regression Analysis
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Dependent Variable | Independent Variable | Intercept | Live Weight | Live Weight Squared | R Squared 1 |
---|---|---|---|---|---|
Coefficient of variation | Live weight, kg | 20.04 | −0.135 | 0.00043 | 0.79 |
Standard deviation | Live weight, kg | 0.41 | 0.150 | −0.00041 | 0.95 |
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Tolosa, A.F.; DeRouchey, J.M.; Tokach, M.D.; Goodband, R.D.; Woodworth, J.C.; Gebhardt, J.T.; Ritter, M.J.; Pilcher, C.M. A Meta-Analysis to Understand the Relationship between Pig Body Weight and Variation from Birth to Market. Animals 2021, 11, 2088. https://doi.org/10.3390/ani11072088
Tolosa AF, DeRouchey JM, Tokach MD, Goodband RD, Woodworth JC, Gebhardt JT, Ritter MJ, Pilcher CM. A Meta-Analysis to Understand the Relationship between Pig Body Weight and Variation from Birth to Market. Animals. 2021; 11(7):2088. https://doi.org/10.3390/ani11072088
Chicago/Turabian StyleTolosa, Andres F., Joel M. DeRouchey, Mike D. Tokach, Robert D. Goodband, Jason C. Woodworth, Jordan T. Gebhardt, Mathew J. Ritter, and Chad M. Pilcher. 2021. "A Meta-Analysis to Understand the Relationship between Pig Body Weight and Variation from Birth to Market" Animals 11, no. 7: 2088. https://doi.org/10.3390/ani11072088
APA StyleTolosa, A. F., DeRouchey, J. M., Tokach, M. D., Goodband, R. D., Woodworth, J. C., Gebhardt, J. T., Ritter, M. J., & Pilcher, C. M. (2021). A Meta-Analysis to Understand the Relationship between Pig Body Weight and Variation from Birth to Market. Animals, 11(7), 2088. https://doi.org/10.3390/ani11072088