Convergent and discriminant construct validity of the MSIS-29
| MSIS-29 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rehabilitation sample | Corticosteroid sample | PPMS sample | Community sample | ||||||
| Instrument | Scale/dimension/ variable | MSIS-29 Physical | MSIS-29 Psychological | MSIS-29 Physical | MSIS-29 Psychological | MSIS-29 Physical | MSIS-29 Psychological | MSIS-29 Physical | MSIS-29 Psychological |
| *Medical Outcomes Study 36-item Short Form Health Survey: high scores = better health. †Functional Assessment of Multiple Sclerosis: high scores = better health. ‡General Health Questionnaire. | |||||||||
| SF-36* | Physical functioning | −0.52 | −0.28 | −0.70 | −0.44 | −0.73 | −0.30 | −0.79 | −0.41 |
| Mental health | −0.39 | −0.73 | −0.46 | −0.77 | −0.30 | −0.64 | −0.41 | −0.76 | |
| FAMS† | Mobility | −0.63 | −0.27 | −0.75 | −0.61 | −0.75 | −0.45 | −0.88 | −0.50 |
| Emotional wellbeing | −0.51 | −0.67 | −0.50 | −0.74 | −0.56 | −0.75 | −0.68 | −0.68 | |
| GHQ‡ | Total score | 0.51 | 0.77 | 0.52 | 0.78 | 0.36 | 0.68 | 0.46 | 0.68 |
| EDSS | 0.27 | 0.14 | 0.69 | 0.48 | – | – | – | – | |
| Demographic variables | Age | −0.01 | −0.06 | −0.03 | −0.16 | −0.16 | −0.09 | 0.22 | 0.03 |
| Sex | −0.01 | −0.02 | −0.20 | −0.16 | 0.19 | 0.06 | 0.05 | −0.05 | |
| Years since diagnosis | 0.09 | 0.09 | 0.18 | −0.17 | 0.19 | −0.02 | 0.19 | 0.03 | |