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Table 2 Mean Rasch score change in Group 2

From: Self-assessed visual function outcome in cataract surgery: minimum important difference of the Catquest-9SF questionnaire

Answer anchor question

Mean Rasch score change

Number of patients (n)

Percentage of patients (%)

1 (Much better)

 − 4.4669

133

82

2 (Somewhat better)

 − 2.6892

24

15

3 (No difference)

 − 0.625

2

1

4 (Somewhat worse)

0.7

3

2

5 (Much worse)

–

0

0

All

 − 4.0604

162

100

  1. Group 2 comprises patients with a preoperative Rasch score of − 1.49 to 5.73; that is, the group with worse preoperative self-assessed visual function
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Eye and Vision

ISSN: 2326-0254