Smartphone camera based assessment of adiposity: a validation study

Statistical strategies

Descriptive statistics have been computed for the participant traits stratified by intercourse, the place applicable. Mounted bias (or imply error) was calculated because the distinction between %BFDXA and %BF estimates from all different strategies evaluated: VBC, cBIA1–3, pBIA1–2, and ADP. Imply absolute error (MAE), customary deviation (SD) of absolute error, and imply absolute p.c error (MAPE) have been calculated for all %BF estimates and stratified by intercourse, BMI, and race. Wilcoxon signed rank check was used to check matched samples to evaluate whether or not their inhabitants imply ranks differ (i.e., paired distinction check) for the general research inhabitants and stratified by intercourse. Pearson correlation and Lin’s concordance correlation coefficient (CCC) between DXA and all different strategies have been additionally calculated and stratified by intercourse. The tactic of Meng et al.52 was used to find out whether or not VBC was considerably higher correlated to the criterion methodology of DXA in comparison with the cBIA1–3, pBIA1–2, and ADP measurements. Bland-Altman plots have been used to find out the imply distinction and 95% limits of settlement (LOA) between DXA reference customary and VBC in addition to all different strategies. No adjustment for a number of comparisons. All analyses have been carried out utilizing Microsoft Excel (Microsoft, Inc., Redmond, WA) and Python. Significance was set at an alpha stage of 0.05, 2-tailed.

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