For example, classes must be distinguishable from each other and of sufficient size, otherwise the stability and reliability of the estimates is questionable [42].
Outside of this study, the reliability of COPD prevalence estimates is questionable.
Whether the additional threshold layer actually increases the accuracy of the genomic breeding value estimates is questionable with a binary or an ordinal data but less so with a censored Gaussian data.
But the idea is questionable.
However, this paper argues that in respect to at least one area of the empirical literature the estimation of the health impacts of air pollution using daily time series data existing estimates are questionable and thus have limited relevance for environmental decision-making.
However, we have shown in earlier work that these estimates are questionable for African countries.
It is generally accepted that there is a lack of information with respect to the dynamics and scale of illicit drug markets, and the validity or reliability of estimates are questionable.
While official statistics indicate that cocaine use is relatively stable in Europe and may be dropping in the USA, it is generally accepted that there is a lack of information with respect to the dynamics and scale of illicit drug markets, and the validity or reliability of estimates are questionable.
Since less severe cases may be more likely to be seen in such setting as compared with tertiary centers, lack of confirmation of PAH diagnosis by right heart catheterization for many of the patients in their study may have been particularly likely to inflate the PAH prevalence estimate such that the estimate may be questionable.
While this approach is questionable, estimates derived in this way have very small weight, so contribute little to meta-analyses.
