The following options are available for the logit model in QuBAS:
Transformation of the dose
The estimation of the relative potency in the logit model assumes the dose will be analysed on a log scale. If the data for dose levels are not already presented on the log scale, the following log scale transformations are available:
log base 2
log base e
log base 10
It is also possible to apply a linear transformation to the dose (prior to applying the log transformation). This allows an offset (linear intercept) to be added to the recorded dose, and a constant multiplier (linear slope) to be applied. This allows, for example, a change to the scale of measurement.
