Correlation (r, Pearson correlation coefficients) between patient reported measures in paper and personal digital assistant (PDA) format, and difference PDA minus paper
| T1 | T2 | |||||
|---|---|---|---|---|---|---|
| r | Difference | r | Difference | |||
| Mean | 95% CI | Mean | 95% CI | |||
| Value are mean (95% confidence interval). | ||||||
| CI, confidence interval; MHAQ, modified health assessment questionnaire; RADAI, rheumatoid arthritis disease activity index; SF-36, short form 36 item health assessment questionnaire; VAS, visual analogue scale. | ||||||
| Pain VAS | 0.87 | 4.5 | 0.1 to 8.9 | 0.93 | 3.6 | 0.3 to 6.9 |
| Fatigue VAS | 0.89 | −2.1 | −7.6 to 3.3 | 0.93 | 3.8 | 0.2 to 7.3 |
| Patient global VAS | 0.86 | 3.8 | −0.5 to 8.1 | 0.84 | 4.8 | 0.5 to 9.2 |
| RADAI | 0.93 | −0.1 | −0.3 to 0.2 | 0.98 | 0.0 | −0.1 to 0.2 |
| MHAQ | 0.97 | −0.01 | −0.05 to 0.03 | 0.97 | 0.03 | −0.02 to 0.08 |
| SF-36 | ||||||
| Physical | 0.94 | −0.9 | −4.1 to 2.2 | 0.95 | 2.1 | −1.2 to 5.4 |
| Mental | 0.91 | −3.7 | −7.1 to 0.4 | 0.95 | −4.3 | −6.5 to −2.1 |
| Pain | 0.79 | −6.0 | −11.4 to −0.6 | 0.82 | 0.1 | −4.5 to 4.7 |
| Vitality | 0.86 | 0.7 | −3.6 to 5.1 | 0.89 | −0.7 | −4.7 to 3.3 |
| General | 0.84 | 4.1 | −1.5 to 9.7 | 0.82 | 5.1 | 0 to 10.1 |