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In other words, the distance between data points in the middle of a visual analogue scale (in millimetres) as deduced from the raw (ordinal) data is in fact much smaller once data are transformed into interval level data and thus the calculation of the SRM provides a good example of the impact of the misuse of ordinal data.
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The models were fitted using robust diagonally weighted least squares method of estimation recommended for the analysis of ordinal data.
Student t test was used for comparison of ordinal data.
As previously mentioned, many clinical questionnaires data are collected as ordinal or binary (a special type of ordinal data).
Others note that summation of ordinal data already assumes numerical value.
This involved the numerical summation and averaging of ordinal data during the calculation of summary scores.
The Mann-Whitney U test was used in case of ordinal data.
CFA followed Jöreskog's guidelines for the analysis of ordinal data (21).
After dichotomization of ordinal data as described above, regular kappa values and overall agreement were calculated.
Some argue that non-parametric statistics should always be used for analysis of ordinal data.
If the effect size for such an intervention had been calculated inappropriately on ordinal data, then its magnitude may have been smaller (as was shown to be the case in the current study) due to the misuse of ordinal raw scores in mathematical calculations [ 54].
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