Estimating the postmortem interval (PMI) using accumulated degree-days (ADD) in a temperate region of South Africa

Show simple item record Myburgh, Jolandie L'Abbe, Ericka Noelle Steyn, Maryna Becker, Piet J. 2013-11-26T09:59:42Z 2013-11-26T09:59:42Z 2013-06
dc.description.abstract The validity of the method in which total body score (TBS) and accumulated degree-days (ADD) are used to estimate the postmortem interval (PMI) is examined. TBS and ADD were recorded for 232 days in northern South Africa, which has temperatures between 17 and 28 °C in summer and 6 and 20 °C in winter. Winter temperatures rarely go below 0 °C. Thirty pig carcasses, which weighed between 38 and 91 kg, were used. TBS was scored using the modified method of Megyesi et al. [1]. Temperature was acquired from an on site data logger and the weather station bureau; differences between these two sources were not statistically significant. Using loglinear random-effects maximum likelihood regression, an r2 value for ADD (0.6227) was produced and linear regression formulae to estimate PMI from ADD with a 95% prediction interval were developed. The data of 16 additional pigs that were placed a year later were then used to validate the accuracy of this method. The actual PMI and ADD were compared to the estimated PMI and ADD produced by the developed formulae as well as the estimated PMIs within the 95% prediction interval. A validation of the study produced poor results as only one pig of 16 fell within the 95% interval when using the formulae, showing that ADD has limited use in the prediction of PMI in a South African setting. en_US
dc.description.librarian hb2013 en_US
dc.description.librarian ay2013 en
dc.description.sponsorship NRF (National Research Foundation of South Africa) and Navkom (University of Pretoria). en_US
dc.description.uri en_US
dc.identifier.citation Myburgh, J, L'Abbe, EN, Steyn, M & Becker, PJ 2013, 'Estimating the postmortem interval (PMI) using accumulated degree-days (ADD) in a temperate region of South Africa', Forensic Science International : Genetics, vol. 229, vol. 1-3, pp.165.e1–165.e6. en_US
dc.identifier.issn 1872-4973 (print)
dc.identifier.issn 1878-0326 (online)
dc.identifier.other 10.1016/j.forsciint.2013.03.037
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2013 Elsevier. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Forensic Science International : Genetics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Forensic Science International : Genetics , vol. 229, no.1-3, 2013, doi.: 10.1016/j.forsciint.2013.03.037 en_US
dc.subject Forensic anthropology en_US
dc.subject Postmortem interval en_US
dc.subject Decomposition en_US
dc.subject Pig models en_US
dc.subject Total body score (TBS) en_US
dc.subject Accumulated degree-days (ADD) en_US
dc.subject.lcsh Postmortem changes -- South Africa en
dc.subject.lcsh Forensic sciences -- South Africa en
dc.title Estimating the postmortem interval (PMI) using accumulated degree-days (ADD) in a temperate region of South Africa en_US
dc.type Postprint Article en_US

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