Table 3.
Reliability
| Variable | Internet Test-retest Reliability, N=30 | I-C Reliability, Cronbach alpha |
||
| Pearson r | Spearman r | Web (N=204) | Questionnaire (N=191) |
|
| Self-reported health | .884 | .890 | single item | single item |
| Pain VNS | .847 | .832 | single item | single item |
| Shortness of Breath VNS | .968 | .940 | single item | single item |
| Fatigue VNS | .864 | .827 | single item | single item |
| MD visits | .784 | .783 | single item | single item |
| ER visits | .999 | 1.000 | single item | single item |
| Hosp nights | .992 | .999 | single item | single item |
| Hospitalizations | 1.000 | 1.000 | single item | single item |
| Illness intrusiveness | .869 | .880 | .668 | .658 |
| Health distress | .935 | .930 | .935 | .931 |
| Self efficacy | .906 | .870 | .912 | .922 |
| HAQ disability | .930 | .931 | .874 | .879 |
| Doctor communication | .874 | .865 | .775 | .750 |
| Relaxation | .684 | .802 | single item | single item |
| Range of motion exercise | .829 | .878 | single item | single item |
| Aerobic exercise | .765 | .921 | n/a | n/a |