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Table 4 Item calibration and fitting for the functional compromise sub-scale of the Keratoconus End-Points Assessment Questionnaire (KEPAQ-F)

From: Standardizing the measurement and classification of quality of life using the Keratoconus End-Points Assessment Questionnaire (KEPAQ): the ABCDEF keratoconus classification

Question Measure Infit MNSQ Outfit MNSQ
Q_F01 − 0.42 2.19 2.18
Q_F02 − 1.03 1.22 1.24
Q_F03 − 0.19 0.73 0.63
Q_F04 − 0.44 0.86 0.75
Q_F05 − 0.14 0.71 0.63
Q_F06 0.00 0.52 0.47
Q_F07 0.28 0.70 0.68
Q_F08 0.31 0.94 0.90
Q_F09 1.63 1.30 1.39