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Table 4 Summary of Rasch calibration of FFI Subscales

From: Many-faceted rasch calibration of the foot function index-revised short form

Item

Calibration logits

SE logits

Infit MNSQ

Outfit MNSQ

Social Issues

1.15

0.01

1.15

1.22

Stiffness

0.15

0.01

0.95

0.93

Pain

-0.30

0.01

0.96

1.02

Activity Limitation

-0.42

0.02

1.17

1.22

Difficulty

-0.58

0.01

0.96

0.89

  1. MNSQ mean square residuals