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Table 3 Correlation between different types of change measurement (indirect, quasi-indirect, direct; product–moment correlation coefficient r or intra-class correlation coeffiecient ICC); regression of transition ratings (standardized linear-regression coefficients); reliability (Cronbach’s alpha)

From: Agreement between pre-post measures of change and transition ratings as well as then-tests

  IRES sleep function SF-36 physical-functioning index SCL-90-R somatisation#
Correlation between measures of change    
Indirect × direct change r = .483*** r = .381*** r = .375***
Indirect × quasi-indirect change r = .657*** r = .713*** r = .603***
Correlation between pre-test, post-test, retrospective pre-test and transition ratings    
Pre-test × retrospective pre-test r = .682*** r = .819*** r = .767***
ICC = .671*** ICC = .815*** ICC = .761***
Pre-test × post-test r = .480*** r = .677*** r = .612***
Retrospective pre-test × post test r = .521*** r = .658*** r = .738***
Transition ratings (direct) × pre test r = −.149 r = −.129 r = −.112
Transition ratings (direct) × post test r = .309*** r = .166* r = .229**
Regression (dependent variable: transition ratings)    
Post test β = .577*** β = .508*** β = .486***
Pre test β = −.475*** β = −.486*** β = −.414***
Reliability (Cronbach’s α)    
Pre test α = .821 α = .919 α = .770
Retrospective pre test α = .896 α = .938 α = .815
Post test α = .817 α = .921 α = .827
Transition ratings (direct) at post test α = .897 α = .959 α = .873
  1. # to allow for better comparability increasing numbers refer to improvement of symptoms.
  2. * p < .05, ** p < .01, ***p < .001.