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Unadjusted mortality among deciles ranged from 47.6%to63.0%0%.
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Figure 1 In-hospital mortality by deciles in hospitals from the National Trauma Data Bank (NTDB) and King Abdulaziz Medical City (KAMC).
Young et al. [ 23] evaluated the independent association between mortality and deciles of PaO2, with the upper decile (PaO2 >341 mmHg) used as the reference category.
To explore the univariable association between continuous variables and mortality, we plotted mortality against deciles of each variable.
We assessed the ability of the model to accurately predict mortality across all ranges of risk by comparing predicted and observed mortality rates in predicted mortality risk deciles.
This indicates that both POSSUM and P-POSSUM models are poor predictors of mortality when deciles are divided according to equal predicted risk, or equal risk ranges.
The distribution among deciles 4 6 (lower deprivation) differs slightly between the two samples but otherwise the two populations have broadly similar characteristics.
The multiple logistic regression model was well calibrated among deciles of observed and expected risk in survivors and nonsurvivors (Hosmer Lemeshow test, P = 0.194, Table 3).
"Elevated mortality among Indigenous people in Canada has historical roots in colonial policy," the study says.
A plot of observed mortality against increasing deciles of predicted mortality risk showed good predictive ability, although the model tended to overestimate mortality in patients with predicted risk between 18% and 23% (third decile group, Additional file 5).
The adjusted hazard ratios (HRs) for all-cause mortality by HbA1c deciles showed a U-shaped curve, irrespective of how or when HbA1c was measured.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com