From: An empirical evaluation of the SF-12, SF-6D, EQ-5D and Michigan Hand Outcome Questionnaire in patients with rheumatoid arthritis of the hand
Average Inter- item correlation
Cronbach’s Alphas
Internal Consistency
MHQ
0.45
0.83
Good
EQ-5D (utility)
0.47
0.84
EQ-5D (VAS)
0.48
SF-12 (PCS)
0.46
SF-12 (MCS)
0.52
0.87
SF-6D
0.44