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Sensitivity and specificity of post-mortem computed tomography in skull fracture detection—a systematic review and meta-analysis

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Abstract

Post-mortem computed tomography (PMCT) has been increasingly used as routine examination in forensic pathology. No recent review of the growing number of papers on the ability of PMCT to detect skull fracture exists, and original papers report sensitivities from 0.85 to 1.00. This systematic review (PROSPERO: CRD42021233264) aims to provide a meta-analysis of sensitivity and specificity of PMCT in skull fracture detection. We searched PubMed, MEDLINE and Embase for papers published between January 2000 and August 2021 reporting raw numbers, sensitivity and specificity or Abbreviated Injury Score for PMCT compared to autopsy. Papers without both PMCT and autopsy, no separate reporting of the neuro-cranium, exclusively on children, sharp trauma, gunshot or natural death as well as case reports and reviews were excluded. Two authors independently performed inclusion, bias assessment and data extraction. QUADAS-2 was used for bias assessment and a random effects models used for meta-analysis. From 4.284 hits, 18 studies were eligible and 13 included in the meta-analysis for a total of 1538 cases. All deceased were scanned on multi-slice scanners with comparable parameters. Images were evaluated by radiologists or pathologists. Intra- and inter-observer analyses were rarely reported. In summary, sensitivity of PMCT for detection of fractures in the skull base was 0.87 [0.80; 0.92] with specificity 0.96 [0.90; 0.98], and sensitivity for the vault was 0.89 [0.80; 0.94] with specificity 0.96 [0.91; 0.98]. The mixed samples are a limitation of the review.

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Fig. 1

source of original papers, reasons for exclusion and number of papers at each stage. n number, AIS Abbreviated Injury Score, “JOFRI” Journal of Forensic Radiology and Imaging (now Forensic Imaging)

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

Code availability

The R code is available in the supplementary material.

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MJH and CV conceived the study. All authors contributed to the protocol and search strategy. MJH and STL performed the literature search and data extraction. MJH analysed the data and wrote first draft. All authors contributed to writing and approved the manuscript.

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Correspondence to Mikkel Jon Henningsen.

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Henningsen, M.J., Larsen, S.T., Jacobsen, C. et al. Sensitivity and specificity of post-mortem computed tomography in skull fracture detection—a systematic review and meta-analysis. Int J Legal Med 136, 1363–1377 (2022). https://doi.org/10.1007/s00414-022-02803-3

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