A closed form score statistic for testing the assumption of non‐informative censoring is proposed for situations in which a random subsample of the censored subjects is followed to determine failure times. The test is derived for grouped survival data under the assumption of a proportional odds mod...
We tested the proportional hazards assumption using Schoenfeld residual plots and tests. We tested for model miscalibration using a modified D’Agostino Nam test23. We referenced the transparent reporting of a multivariable prediction model for individual prognosis or diagnosis (TRIPOD) reporting standards...
Univariate proportional odds analysis of parameters versus Glasgow Outcome Score.Faiez Al NimerEric ThelinHarriet NyströmAnn M. DringAnders SvenningssonFredrik PiehlDavid W. NelsonBoMichael Bellander
The proportional hazards assumption for STI-HIV HR was assessed using visual examination of log-log survival curves and goodness-of-fit testing using Schoenfeld residuals [34]. IPTW-weighted adjusted survival curves were created [35]. All analyses were performed in SAS v9.3 (SAS Institute, Cary...
A full implementation of the algorithm ( repolr) in the R statistical software package, that both tests the assumption of proportional odds and accommodates missing data, is described and applied to a clinical trial of post-operative treatment, after rupture of the Achilles tendon and a study ...
“population assumption,” we created a subsample including all ER-negative cancers plus an equal number of randomly selected ER-positive cases. We repeated the subsampling procedure 1000 times and calculated for each repetition the median expression of each PAM50 gene. For each gene, we calculated...
When CFS was used as a categorical variable, the proportional hazards assumption was met except for CFS 5 vs CFS 1–4. The result from the mid-term analysis has to be interpreted with caution. However, in these cases, the HR is still interpretable as a population-average HR over the ...
We verified the proportional hazards assumption for each covariate using ln-ln survival curves and an interaction term of the covariate with time. To assess the presence of interaction between race and the ODX RS, we used the common referent approach to calculate the relative excess risk due to...
The proportional odds assumption was verified, and an OR and 95% CI were reported to characterize the change in likelihood of having greater extent of CAD based on a one-unit increase in continuous ASGES. Prognostic analyses The Cox proportional hazards regression model was used to assess the ...
This assumption was shown to be correct when the JAP1 family was demonstrated to have a deletion of exons 1–48 of ITPR1, leaving SUMF1 intact (Iwaki et al., 2008). The JAP2 family harboured a deletion of all 58 exons of ITPR1 and exon 1 of SUMF1 (Hara et al., 2008), while...