Exact(24)
The classical log-rank test provides a biased comparison even under independent right censoring since the censoring induced on the time since state entry depends on the entry time unless the hazards are semi-Markov.
If women with children have, on average, different health status, lifestyle and socio-economic conditions than nulliparous women, this biased comparison may alter the finding of no overall difference in cancer risk among mothers of cryptorchid men.
Therefore, this will not result in a biased comparison.
We excluded studies with irrelevant or obviously biased comparison groups (such as treatment dropouts).
However, these studies are somewhat limited by their inclusion of only septic patients or only AKI patients, and therefore they provide a potentially biased comparison.
There is however a high chance to get a biased comparison if some testing data are already learned by one of the methods.
Similar(36)
This consistency is a condition for minimally biased comparisons involving histone variants and GGRs.
Nicholl pointed out that case mix adjustment can create biased comparisons when underlying relations between case mix variables and outcome are not the same in all the comparison groups.
Similarly, the exclusion of workers of non-Caucasian ethnicity would not have biased comparisons of mortality internal to the cohort, although it limits the confidence with which findings can be generalised to non-Caucasian ethnic groups.
Some images were enhanced using Adobe Photoshop, but all images in the same figure were placed side by side in the same layer prior to any enhancements or modifications to avoid biased comparisons.
The risk of relapse during the unrelated donor coordination period considerably biases comparisons between unrelated and related transplantation, even if such confounding factors are considered in multivariate analyses.
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