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Postmortem heart weight modelled using piecewise linear regression in 27,645 medicolegal autopsy cases.

Wingren, Carl Johan LU and Ottosson, Anders LU (2015) In Forensic Science International 252. p.157-162
Abstract
The interpretation of postmortem heart weight is often difficult, and references for normal heart weight are important. However, to assess the cause of death at a medicolegal autopsy it is also important to have references based on an unselected population of medicolegal autopsy cases with non-natural causes of death (not due directly to disease). We aimed at studying and deriving references for adult heart weight by considering sex, age and body size in cases with an external cause of death. We identified all medicolegal autopsies in Sweden from 1999 to 2013 (n=79,778) and included 27,645 cases. We applied multivariate piecewise linear regression models in three strata of body mass-underweight, normal-/overweight and obesity. We observed... (More)
The interpretation of postmortem heart weight is often difficult, and references for normal heart weight are important. However, to assess the cause of death at a medicolegal autopsy it is also important to have references based on an unselected population of medicolegal autopsy cases with non-natural causes of death (not due directly to disease). We aimed at studying and deriving references for adult heart weight by considering sex, age and body size in cases with an external cause of death. We identified all medicolegal autopsies in Sweden from 1999 to 2013 (n=79,778) and included 27,645 cases. We applied multivariate piecewise linear regression models in three strata of body mass-underweight, normal-/overweight and obesity. We observed that approximately 50% of the variation in heart weight was explained by age, sex and body size. These variables were slightly less important in explaining the variation in heart weight in the underweight and obese compared to in those normal or overweight. Based on the linear regression models we present equations to calculate the predicted heart weight with reference intervals using age, sex, body weight and height. We provide an online heart weight calculator (http://lundforensicmedicine.com) based on these equations. In the forensic interpretation of postmortem heart weights, we suggest that heart weight references derived in cases with an external cause of death is an important complement to references solely based on healthy and normal hearts. Furthermore, the heart weight references presented are derived from a large population, with sufficient numbers for separate models in underweight, normal-/overweight and obese populations. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Forensic Science International
volume
252
pages
157 - 162
publisher
Elsevier
external identifiers
  • pmid:26004078
  • wos:000355816200021
  • scopus:84929624993
ISSN
1872-6283
DOI
10.1016/j.forsciint.2015.04.036
language
English
LU publication?
yes
id
0fb1f6ba-b6d0-43ea-985c-479193ab79c2 (old id 5442508)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/26004078?dopt=Abstract
date added to LUP
2015-06-05 12:08:23
date last changed
2017-10-22 03:04:30
@article{0fb1f6ba-b6d0-43ea-985c-479193ab79c2,
  abstract     = {The interpretation of postmortem heart weight is often difficult, and references for normal heart weight are important. However, to assess the cause of death at a medicolegal autopsy it is also important to have references based on an unselected population of medicolegal autopsy cases with non-natural causes of death (not due directly to disease). We aimed at studying and deriving references for adult heart weight by considering sex, age and body size in cases with an external cause of death. We identified all medicolegal autopsies in Sweden from 1999 to 2013 (n=79,778) and included 27,645 cases. We applied multivariate piecewise linear regression models in three strata of body mass-underweight, normal-/overweight and obesity. We observed that approximately 50% of the variation in heart weight was explained by age, sex and body size. These variables were slightly less important in explaining the variation in heart weight in the underweight and obese compared to in those normal or overweight. Based on the linear regression models we present equations to calculate the predicted heart weight with reference intervals using age, sex, body weight and height. We provide an online heart weight calculator (http://lundforensicmedicine.com) based on these equations. In the forensic interpretation of postmortem heart weights, we suggest that heart weight references derived in cases with an external cause of death is an important complement to references solely based on healthy and normal hearts. Furthermore, the heart weight references presented are derived from a large population, with sufficient numbers for separate models in underweight, normal-/overweight and obese populations.},
  author       = {Wingren, Carl Johan and Ottosson, Anders},
  issn         = {1872-6283},
  language     = {eng},
  pages        = {157--162},
  publisher    = {Elsevier},
  series       = {Forensic Science International},
  title        = {Postmortem heart weight modelled using piecewise linear regression in 27,645 medicolegal autopsy cases.},
  url          = {http://dx.doi.org/10.1016/j.forsciint.2015.04.036},
  volume       = {252},
  year         = {2015},
}