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Table 2 Change scores calculated using the different approaches for measuring change (indirect, quasi-indirect, direct)

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

Outcome 1)

 

Status

Change

Pre

Retro-spective pre

Post

Indirect post minus pre

Quasi-indirect post minus retrospective pre

Direct transition rating

IRES sleep function2)

M (SD)

3.7 (1.2)

3.8 (1.3)

4.2(1.1)

0.5 (1.2)

0.4 (1.2)

0.2 (0.7)

CI 95%

--

--

--

0.4; 0.6

0.2; 0.6

0.1; 0.3

ES

--

--

--

0.413)

0.363)

0.284)

N

343

192

347

319

161

147

SF-36 physical functioning index2)

M (SD)

49.3 (27.3)

48.6 (30.0)

64.3 (26.2)

15.1 (21.5)

16.9 (23.5)

0.5 (0.7)

CI 95%

--

--

--

12.9; 17.2

13.5; 20.2

0.4; 0.7

ES

--

--

--

0.703)

0.723)

0.714)

N

383

191

383

383

191

184

SCL-90-R somatisation5)

M (SD)

2.0 (0.6)

1.9 (0.6)

1.7 (0.5)

−0.3 (0.5)

−0.2 (0.4)

0.3 (0.5)

CI 95%

--

--

--

−0.4; −0.3

−0.3; −0.2

0.2; 0.4

ES

--

--

--

0.663)

0.573)

0.604)

N

386

180

386

386

180

186

  1. Legend: post  pre = indirect measurement of change; post  retrospective pre = quasi-indirect measurement of change; directly reported change = direct measurement of change; M = mean, SD = standard deviation; CI = 95% confidence interval; ES = effect size.
  2. 1) for respondents completing t0 and t1 and providing valid responses2) Higher scores indicate better functioning.
  3. 3) standardized response mean (Mt1 Mt0)/SDdiff t1−t0.
  4. 4) M/SD.
  5. 5) Higher scores indicate higher level of somatisation.