Table 5

Construct validity indicated by binary clinical subgroups at 24 months
Clinically meaningful subgrouping Subscale Scores
Work status Not working because of ulnar neuropathy (n = 9) Working or able to work at previous job (n = 34)
Mean SD Mean SD
Total score 53.8 14.6 16.5 16.2
Pain 34.1 16.1 11.2 12.5
Symptoms 27.8 12.0 11.6 10.7
Specific activities 48.4 12.7 13.0 16.9
Usual activities 19.9 7.0 5.4 8.7
Ability to do activities Limited (n = 25) Not limited (n-27)
Mean SD Mean SD
Total score 37.8 18.0 10.8 12.0
Pain 23.0 16.7 8.8 8.9
Symptoms 20.6 11.6 8.1 9.1
Specific activities 34.5 22.7 4.9 13.3
Usual activities 15.0 8.3 1.7 2.5
Sensibility Abnormal (> 5 mm) (n-14) Normal (n = 28)
Mean SD Mean SD
Total score 26.8 24.2 21.9 21.4
Pain 16.3 17.9 18.4 15.3
Symptoms 22.0 12.5 10.9 11.8
Specific activities 25.5 27.0 15.4 19.3
Usual activities 10.1 10.6 7.1 9.3

All subscale scores and the total score were significantly different between subgroups for both work status and activity status. For sensory subgroups only the sensory/motor (SM) symptoms scale was different between subgroups. All p-values were significant at p < 0.01.

MacDermid and Grewal

MacDermid and Grewal BMC Musculoskeletal Disorders 2013 14:146   doi:10.1186/1471-2474-14-146

Open Data