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Lamer M, Spake L, Cardoso HFV. Testing the cross-applicability of juvenile sex estimation from diaphyseal dimensions. Forensic Sci Int 2021; 321:110739. [PMID: 33662898 DOI: 10.1016/j.forsciint.2021.110739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 02/10/2021] [Accepted: 02/17/2021] [Indexed: 10/22/2022]
Abstract
Sex estimation is a crucial component of the biological profile. Stull et al. (2017) have proposed a promising juvenile sex estimation method using long bone measurements taken from a South African sample, providing relatively high classification accuracies and made easy to use via the KidStats web-based app. In this study, we test the models developed by Stull et al. (2017) on an external historic population from Lisbon, Portugal, in order to determine whether the models can be reliably applied to archeological and forensic populations outside of the original population sample. The study sample consisted of 102 individuals (45 females and 57 males) aged under 13 years at death from the Lisbon identified skeletal collection. Measurements from these individuals were used to test the flexible discriminant analysis (FDA) models given by Stull et al. (2017). Allocation accuracies were calculated for boys and girls and children over and under 2 years separately and combined. Our findings show that the models developed by Stull et al. (2017) yield poor accuracy when applied to our external population and thus can potentially be misapplied on archeological skeletal remains or forensic remains of unknown origin. A number of statistical issues may explain why models fail to be transportable or even generalizable, namely multicollinearity, model overfitting and overly optimist bootstrapped cross-validation rates. It is also likely that population differences in size and sexual size dimorphism also affected the applicability of the models. We emphasize the importance of externally validating prediction models, particularly if they are intended to be applied across populations. Our study addresses Stull and co-worker's request for further validation of the method on populations outside of South Africa, as the models cannot be confidently applied in the field until it has been externally validated.
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Affiliation(s)
- Madeleine Lamer
- Department of Anthropology, McMaster University, Hamilton, Ontario, Canada
| | - Laure Spake
- Religion Programme and Centre for Research on Evolution, Belief, and Behaviour, University of Otago, Dunedin, New Zealand
| | - Hugo F V Cardoso
- Department of Archaeology, Simon Fraser University, Burnaby, British Columbia, Canada.
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Erdei G, Bakacs M, Illés É, Nagy B, Kaposvári C, Mák E, Nagy ES, Cserháti Z, Kovács VA. Substantial variation across geographic regions in the obesity prevalence among 6-8 years old Hungarian children (COSI Hungary 2016). BMC Public Health 2018; 18:611. [PMID: 29743055 PMCID: PMC5944005 DOI: 10.1186/s12889-018-5530-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 05/01/2018] [Indexed: 11/10/2022] Open
Abstract
Background There have been previous representative nutritional status surveys conducted in Hungary, but this is the first one that examines overweight and obesity prevalence according to the level of urbanization and in different geographic regions among 6–8-year-old children. We also assessed whether these variations were different by sex. Methods This survey was part of the fourth data collection round of World Health Organization (WHO) Childhood Obesity Surveillance Initiative which took place during the academic year 2016/2017. The representative sample was determined by two-stage cluster sampling. A total of 5332 children (48.4% boys; age 7.54 ± 0.64 years) were measured from all seven geographic regions including urban (at least 500 inhabitants per square kilometer; n = 1598), semi-urban (100 to 500 inhabitants per square kilometer; n = 1932) and rural (less than 100 inhabitants per square kilometer; n = 1802) areas. Results Using the WHO reference, prevalence of overweight and obesity within the whole sample were 14.2, and 12.7%, respectively. According to the International Obesity Task Force (IOTF) reference, rates were 12.6 and 8.6%. Northern Hungary and Southern Transdanubia were the regions with the highest obesity prevalence of 11.0 and 12.0%, while Central Hungary was the one with the lowest obesity rate (6.1%). The prevalence of overweight and obesity tended to be higher in rural areas (13.0 and 9.8%) than in urban areas (11.9 and 7.0%). Concerning differences in sex, girls had higher obesity risk in rural areas (OR = 2.0) but boys did not. Odds ratios were 2.0–3.4 in different regions for obesity compared to Central Hungary, but only among boys. Conclusions Overweight and obesity are emerging problems in Hungary. Remarkable differences were observed in the prevalence of obesity by geographic regions. These variations can only be partly explained by geographic characteristics. Trial registration Study protocol was approved by the Scientific and Research Ethics Committee of the Medical Research Council (61158–2/2016/EKU).
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Affiliation(s)
- Gergő Erdei
- School of PhD Studies, Doctoral School of Pathological Sciences, Health Science Research, Semmelweis University, 26 Üllői Street, Budapest, 1085, Hungary. .,Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary. .,Department of Dietetics and Nutrition Sciences, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, Budapest, 1088, Hungary.
| | - Márta Bakacs
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
| | - Éva Illés
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
| | - Barbara Nagy
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
| | - Csilla Kaposvári
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
| | - Erzsébet Mák
- Department of Dietetics and Nutrition Sciences, Faculty of Health Sciences, Semmelweis University, 17 Vas Street, Budapest, 1088, Hungary
| | - Eszter Sarkadi Nagy
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
| | - Zoltán Cserháti
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
| | - Viktória Anna Kovács
- Division of Nutrition, National Institute of Pharmacy and Nutrition, 3 Zrínyi Street, Budapest, 1051, Hungary
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Pintér Z, Pósa A, Varga C, Horváth I, Palkó A, Just Z, Pálfi G. Anthropometric dimensions provide reliable estimates of abdominal adiposity: A validation study. HOMO-JOURNAL OF COMPARATIVE HUMAN BIOLOGY 2017; 68:398-409. [PMID: 29066093 DOI: 10.1016/j.jchb.2017.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 06/18/2017] [Indexed: 12/31/2022]
Abstract
Abdominal fat accumulation is a major risk factor for cardiometabolic morbidity and mortality. The purpose of the study is to assess the possibility of developing accurate estimation equations based on body measurements to determine total abdominal (TFA), subcutaneous (SFA) and visceral fat area (VFA). Hungarian volunteers (n=198) aged between 20 and 81 years were enrolled in the study, which was conducted between July and November 2014. All persons underwent anthropometric measurements and computer tomographic (CT) scanning. Sex-specific multiple linear regression analyses were conducted in a subgroup of 98 participants to generate estimation models, then Bland-Altman's analyses were applied in the cross-validation group to compare their predictive efficiency. The variables best predicting VFA were hip circumference, calf circumference and waist-to-hip ratio (WHR) for males (R2=0.713; SEE=5602.1mm2) and sagittal abdominal diameter (SAD), WHR, thigh circumference and triceps skinfold for females (R2=0.845; SEE=3835.6mm2). The SFA prediction equation included SAD, thigh circumference and abdominal skinfold for males (R2=0.848; SEE=4124.1mm2), body mass index and thigh circumference for females (R2=0.861; SEE=5049.7mm2). Prediction accuracy was the highest in the case of TFA: hip circumference and WHR for males (R2=0.910; SEE=5637.2mm2), SAD, thigh circumference and abdominal skinfold for females (R2=0.915; SEE=6197.5mm2) were used in the equations. The results suggested that deviations in the predictions were independent of the amount of adipose tissue. Estimation of abdominal fat depots based on anthropometric traits could provide a cheap, reliable method in epidemiologic research and public health screening to evaluate the risk of cardiometabolic events.
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Affiliation(s)
- Z Pintér
- Department of Biological Anthropology, University of Szeged, Közép fasor 52, Szeged 6726, Hungary.
| | - A Pósa
- Department of Physiology, Anatomy and Neuroscience, University of Szeged, Közép fasor 52, Szeged 6726, Hungary
| | - C Varga
- Department of Physiology, Anatomy and Neuroscience, University of Szeged, Közép fasor 52, Szeged 6726, Hungary
| | - I Horváth
- Affidea Diagnostics Szeged Center / Affidea Diagnostics Ltd. - Szeged, Semmelweis u. 6, Szeged 6725, Hungary
| | - A Palkó
- Department of Radiology, University of Szeged, Semmelweis u. 6, Szeged 6725, Hungary
| | - Z Just
- Department of Biological Anthropology, University of Szeged, Közép fasor 52, Szeged 6726, Hungary
| | - G Pálfi
- Department of Biological Anthropology, University of Szeged, Közép fasor 52, Szeged 6726, Hungary
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Cardoso HFV, Vandergugten JM, Humphrey LT. Age estimation of immature human skeletal remains from the metaphyseal and epiphyseal widths of the long bones in the post-natal period. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2016; 162:19-35. [DOI: 10.1002/ajpa.23081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/22/2016] [Accepted: 08/13/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Hugo F. V. Cardoso
- Department of Archaeology; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
| | - John M. Vandergugten
- Department of Archaeology; Simon Fraser University; Burnaby British Columbia V5A 1S6 Canada
| | - Louise T. Humphrey
- Human Origins Group, Department of Palaeontology; The Natural History Museum; London SW7 5BD United Kingdom
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