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Interobserver Reliability of the Total Body Score System for Quantifying Human Decomposition
Author(s) -
Dabbs Gretchen R.,
Connor Melissa,
Bytheway Joan A.
Publication year - 2016
Publication title -
journal of forensic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.715
H-Index - 96
eISSN - 1556-4029
pISSN - 0022-1198
DOI - 10.1111/1556-4029.12962
Subject(s) - intraclass correlation , reliability (semiconductor) , statistics , mathematics , correlation , consistency (knowledge bases) , scoring system , trunk , medicine , surgery , reproducibility , biology , ecology , power (physics) , physics , geometry , quantum mechanics
Several authors have tested the accuracy of the Total Body Score ( TBS ) method for quantifying decomposition, but none have examined the reliability of the method as a scoring system by testing interobserver error rates. Sixteen participants used the TBS system to score 59 observation packets including photographs and written descriptions of 13 human cadavers in different stages of decomposition (postmortem interval: 2–186 days). Data analysis used a two‐way random model intraclass correlation in SPSS (v. 17.0). The TBS method showed “almost perfect” agreement between observers, with average absolute correlation coefficients of 0.990 and average consistency correlation coefficients of 0.991. While the TBS method may have sources of error, scoring reliability is not one of them. Individual component scores were examined, and the influences of education and experience levels were investigated. Overall, the trunk component scores were the least concordant. Suggestions are made to improve the reliability of the TBS method.