Changes in version 2023-12-05                      

  - added options to specify the cox-snell or nagelkerke's r-squared
    directly for binary outcome models
  - simplified continuous outcome models criteria 3 calculation fixing
    MMOE=10% so that N=234+p

                     Changes in version 2022-02-12                      

  - fixes issue for continuous outcome models in criteria 4 in
    calculating the CI for the intercept based on final SS
  - edit to criteria 2 for continuous outcomes to round up N

                     Changes in version 2021-11-21                      

  - fixes issues with rounding leading to small differences in Max_Rsq
    and subsequently sample size calculations
  - additional output including Nagelkerke's R-sq (binary & survival
    outcomes)

                     Changes in version 2021-06-24                      

  - update allowing user to input C-statistic from existing model to
    approximate Cox-Snell R-squared (for binary outcome model sample
    size calculations)
  - additional parameter checks

                     Changes in version 2020-07-24                      

  - version issues fixes

                     Changes in version 2020-07-23                      

Continuous outcomes:

  - calculation of shrinkage for each criteria based on N needed in
    specific criteria

  - also allowance for the unique scenario when starting N already meets
    shrinkage requirement set by user (this is more for academic
    exercise, as in practice a high shrinkage will be desired and so it
    is very rare that the base N (set to p+2) will provide good
    shrinkage)

Binary and TTE outcomes:

  - more informative error message added for rare scenario where
    shrinkage is specified lower than r-squared which results in NaNs
    from shrinkage formula

                     Changes in version 2019-11-15                      

  - update forces the time-unit to be the mean follow-up time, as
    described in forthcoming BMJ paper which extends the original
    Statistics in Medicine paper (see reference in help file)

  - updated in calculation of max R-sq for survival option, to prevent
    manipulation based on time units used

                     Changes in version 2019-08-02                      

  - updated in line with correction to original article in eq. 13

                     Changes in version 2019-01-02                      

  - this is a new release