Table 5.
External construct validity (related and unrelated measures) for IES-R and IES-6
| IES-R | IES-6 | |
|---|---|---|
| r (95% CI)* | r (95% CI)* | |
| Related measures | ||
| SF-36 Mental Health Domain | −0.45 (− 0.48, − 0.42) | − 0.42 (− 0.46, − 0.39) |
| SF-36 Mental Component Summary | − 0.48 (− 0.52, − 0.45) | − 0.46 (− 0.49, − 0.42) |
| EQ-5D-3L—Anxiety/Depression item | 0.33 (0.29, 0.37) | 0.32 (0.28, 0.35) |
| HADS—Anxiety Subscale | 0.55 (0.52, 0.58) | 0.52 (0.49, 0.55) |
| HADS—Depression Subscale | 0.42 (0.39, 0.46) | 0.40 (0.37, 0.44) |
| Unrelated measures | ||
| SF-36 Role Physical Domain | − 0.30 (− 0.34, − 0.26) | − 0.27 (− 0.32, − 0.24) |
| SF-36 Physical Function Domain | − 0.23 (− 0.26, − 0.19) | − 0.21 (− 0.24, − 0.18) |
| EQ-5D-3L Mobility | 0.16 (0.12, 0.20) | 0.15 (0.11, 0.19) |
| EQ-5D-3L Self-Care | 0.12 (0.09, 0.16) | 0.12 (0.09, 0.16) |
| FPIc Body Care | − 0.26 (− 0.30, − 0.21) | −0.22 (− 0.27, − 0.18) |
| FPI Maintain Household | − 0.28 (− 0.33, − 0.24) | −0.26 (− 0.30, − 0.21) |
| FPI Physical Exercise | − 0.28 (− 0.32, − 0.23) | −0.24 (− 0.29, − 0.20) |
| Healthcare Utilization | ||
| Oxygen Therapy | 0.05 (0.00, 0.09) | 0.04 (0.00, 0.08) |
| X-ray | 0.07 (0.02, 0.12) | 0.05 (0.01, 0.10) |
| MRI | 0.03 (− 0.02, 0.08) | 0.02 (− 0.02, 0.07) |
| CT | 0.04 (0.01, 0.08) | 0.03 (0.02, 0.07) |
*r = correlation coefficient computed with longitudinal random effects model. 95% CI 95% confidence interval. SF-36 Short Form Healthy Survey-36 Version 2, HADS Hospital Anxiety and Depression Scale, FPI Functional Performance Inventory collected during ALTOS only, MRI magnetic resonance imaging, CT computed tomography