Table 3 Results of QLICD-AD (V2.0) items analysis based on four methods under CTT

Physical Function

0.706

GPH1

1.071*

0.482

0.382

0.692*

II

GPH2

1.073*

0.442

0.484

0.691*

II

GPH3

1.328*

0.551*

0.541*

0.674*

I

GPH4

0.984*

0.479

0.485

0.691*

II

GPH5

1.229*

0.559*

0.590*

0.676*

I

GPH6

0.970*

0.481

0.578*

0.691*

I

GPH7

1.388*

0.648*

0.573*

0.655*

I

GPH8

1.076*

0.582*

0.496

0.676*

I

GPH9

1.221*

0.551*

0.608*

0.680*

I

Psychological Function

0.855

GPS1

1.238*

0.491

0.565*

0.853*

I

GPS2

1.309*

0.604*

0.568*

0.844*

I

GPS3

1.181*

0.321

0.562*

0.866

II

GPS4

1.235*

0.711*

0.698*

0.835*

I

GPS5

1.325*

0.613*

0.627*

0.844*

I

GPS6

1.391*

0.703*

0.699*

0.836*

I

GPS7

1.327*

0.822*

0.735*

0.825*

I

GPS8

1.374*

0.786*

0.709*

0.828*

I

GPS9

1.401*

0.700*

0.693*

0.837*

I

GPS10

1.299*

0.457

0.529*

0.856

II

GPS11

1.192*

0.697*

0.658*

0.835*

I

Social Function

0.758

GSO1

1.322*

0.556*

0.636*

0.729*

I

GSO2

1.014*

0.681*

0.471

0.738*

I

GSO3

0.928*

0.553*

0.476

0.742*

I

GSO4

1.053*

0.445

0.473

0.713*

II

GSO5

1.214*

0.706*

0.543*

0.699*

I

GSO6

1.382*

0.481

0.446

0.774

III

GSO7

1.398*

0.534*

0.568*

0.753*

I

GSO8

1.170*

0.836*

0.569*

0.709*

I

Specific module

0.865

AD1

1.343*

0.632*

0.546*

0.856*

I

AD2

1.267*

0.541*

0.464

0.861*

I

AD3

1.405*

0.685*

0.583*

0.850*

I

AD4

1.291*

0.660*

0.713*

0.853*

I

AD5

1.172*

0.533*

0.380

0.861*

I

AD6

1.281*

0.727*

0.644*

0.847*

I

AD7

1.292*

0.715*

0.630*

0.849*

I

AD8

1.281*

0.588*

0.540*

0.854*

I

AD9

1.300*

0.589*

0.533*

0.857*

I

AD10

1.466*

0.725*

0.644*

0.849*

I

AD11

1.327*

0.592*

0.473

0.858*

I

AD12

1.192*

0.491

0.530*

0.863*

I