The PEDro scale is a valid measure of the methodological quality of clinical trials: a demographic study

Does the PEDro scale measure only one construct ie, the methodological quality of clinical trials? What is the hierarchy of items of the PEDro scale from least to most adhered to? Is there any effect of year of publication of trials on item adherence? Are PEDro scale ordinal scores equivalent to interval data?Rasch analysis of two independent samples of 100 clinical trials from the PEDro database scored using the PEDro scale.Both samples of...