Table 3.
Bivariate correlations among study variables with 95% confidence intervals
| Pearson Correlation | Sig. (2-tailed) | 95% Confidence Intervals (2-tailed)a | ||
|---|---|---|---|---|
| Lower | Upper | |||
| Age - MSWS12 | .17 | .003 | .06 | .28 |
| Age - T25FW | .14 | .016 | .03 | .25 |
| Age - 6MWT | -.21 | .000 | -.31 | -.09 |
| Age - EDSS | .20 | .001 | .09 | .31 |
| Age - MFIS | .24 | <.001 | .13 | .35 |
| Age - PHQ9 | -.05 | .412 | -.16 | .07 |
| MSWS12 - T25FW | .64 | <.001 | .57 | .70 |
| MSWS12 - 6MWT | -.61 | <.001 | -.67 | -.53 |
| MSWS12 - EDSS | .47 | <.001 | .37 | .55 |
| MSWS12 - MFIS | .45 | <.001 | .36 | .54 |
| MSWS12 - PHQ9 | .28 | <.001 | .17 | .38 |
| T25FW - 6MWT | -.60 | <.001 | -.67 | -.52 |
| T25FW - EDSS | .45 | <.001 | .35 | .54 |
| T25FW - MFIS | .52 | <.001 | .43 | .60 |
| T25FW - PHQ9 | .27 | <.001 | .16 | .37 |
| 6MWT - EDSS | -.60 | <.001 | -.67 | -.52 |
| 6MWT - MFIS | -.50 | <.001 | -.58 | -.41 |
| 6MWT - PHQ9 | -.19 | .001 | -.30 | -.08 |
| EDSS - MFIS | .52 | .000 | .43 | .60 |
| EDSS - PHQ9 | .14 | .017 | .03 | .25 |
| MFIS - PHQ9 | .25 | <.001 | .14 | .36 |
Pearson correlation coefficients (two-tailed), corresponding p-values, and 95% confidence intervals are reported
Confidence intervals were estimated using Fisher’s r-to-z transformation with bias adjustment
MSWS12 12-item Multiple Sclerosis Walking Scale, T25FW Timed 25-Foot Walk, 6MWT Six- Minute Walk Test;
EDSS Expanded Disability Status Scale, PHQ-9 Patient Health Questionnaire-9
aEstimation is based on Fisher's r-to-z transformation with bias adjustment. All correlations are significant at p < .05 unless otherwise noted