Table 8 Known-groups comparisonusing diagnosis variables external to the scales

Diagnosis of anxiety (N=2,564)

No diagnosis of anxiety (N=10,095)

Wilcoxon rank sum Wstatistic

pvalue

Psychological Distress MIRT score

median= 0.22

median= -0.08

8,208,987

< .001

Diagnosis of arthritis (N=4,276)

No diagnosis of arthritis (N=8,383)

Wilcoxon rank sum Wstatistic

pvalue

Pain MIRT score

median= 0.24

median= -0.14

13,694,869

< .001

Difficulty with Mobility MIRT score

median= 0.15

median= -0.23

13,969,526

< .001

Difficulty with Activities of Daily Living MIRT score

median= 0.15

median= -0.17

14,039,972

< .001

Diagnosis of diseases of musculoskeletal system and connective tissues (N=9,297)

No diagnosis of diseases of musculoskeletal system and connective tissues (N=3,362)

Wilcoxon rank sum Wstatistic

pvalue

Pain MIRT score

median= 0.06

median= -0.32

11,555,660

< .001

Mobility MIRT score

median= 0.09

median= -0.38

10,897,243

< .001

Activities of Daily Living MIRT score

median= 0.08

-0.39

10,721,472

< .001

Diagnosis of dyspnea, diseases of respiratory system, pulmonary symptoms (N=11,476)

No diagnosis of dyspnea, diseases of respiratory system, pulmonary symptoms (N=1,183)

Wilcoxon rank sum Wstatistic

pvalue

Respiratory symptoms MIRT score

median= 0.13

median= -0.46

4,547,788

< .001