Table 4. Convergent and Construct Validity of PHQ-ADS Ordinal Categories.
| Measure | PHQ-ADS Category (Score Range) | P-value* | |||
|---|---|---|---|---|---|
|
| |||||
| Minimal | Mild | Moderate | Severe | ||
| (0-9) | (10-19) | (20-29) | (30-48) | ||
|
| |||||
| Convergent Validity | Mean (SD) | ||||
|
| |||||
| PHQ-9 | |||||
| SCOPE | 3.3 (2.3) | 8.8 (2.3) | 14.2 (3.2) | 19.5 (3.7) | < .001 |
| ESCAPE | 3.8 (1.9) | 8.6 (2.3) | 13.5 (3.0) | 18.7 (3.3) | < .001 |
| INCPAD | 1.9 (2.5) | 11.1 (3.3) | 15.5 (3.5) | 19.8 (3.6) | < .001 |
|
| |||||
| GAD-7 | |||||
| SCOPE | 1.3 (1.6) | 4.9 (2.5) | 9.8 (2.9) | 16.3 (3.2) | < .001 |
| ESCAPE | 2.4 (1.4) | 6.5 (2.2) | 10.5 2.6) | 15.8 (2.8) | <.001 |
| INCPAD | 1.9 (2.1) | 4.1 (2.9) | 8.6 (3.6) | 15.8 (3.2) | < .001 |
|
| |||||
| PROMIS-ADS | |||||
| SCOPE | 9.4 (2.3) | 12.0 (4.2) | 18.8 (5.8) | 26.6 (7.1) | < .001 |
|
| |||||
| SF Mental (MHI-5) | |||||
| SCOPE | 85.5 (7.7) | 75.0 (13.2) | 52.5 (16.9) | 36.5 (18.2) | < .001 |
| ESCAPE | 81.0 (13.5) | 67.3 (13.7) | 50.5 (14.4) | 34.1 (15.1) | < .001 |
| INCPAD | 82.2 (10.8) | 64.5 (15.3) | 49.7 (15.0) | 35.1 (17.0) | < .001 |
|
| |||||
| SF MCS | |||||
| SCOPE | 56.8 (5.4) | 50.7 (8.3) | 39.6 (9.7) | 29.4 (9.8) | < .001 |
| ESCAPE | 55.4 (7.2) | 46.9 (8.8) | 37.0 (7.9) | 27.8 (7.3) | < .001 |
| INCPAD | 54.0 (8.7) | 44.8 (8.7) | 36.8 (9.9) | 30.5 (10.8) | < .001 |
|
| |||||
| Construct Validity | Mean (SD) | ||||
|
| |||||
| SF Vitality | |||||
| SCOPE | 56.1 (19.4) | 38.3 (16.1) | 25.3 (19.5) | 21.0 (16.9) | < .001 |
| ESCAPE | 50.0 (20.0) | 40.8 (16.0) | 31.2 (15.2) | 21.5 (13.4) | < .001 |
| INCPAD | 46.7 (18.7) | 30.6 (18.4) | 23.3 (16.0) | 19.1 (14.7) | < .001 |
|
| |||||
| SF Social | |||||
| SCOPE | 82.8 (19.8) | 69.2 (21.6) | 48.8 (24.8) | 37.9 (23.9) | < .001 |
| ESCAPE | 75.9 (21.1) | 61.0 (21.0) | 46.0 (22.1) | 29.9 (17.1) | < .001 |
|
| |||||
| Disability Days | |||||
| SCOPE | 4.7 (6.5) | 9.1 (8.2) | 13.0 (7.4) | 16.2 (8.6) | < .001 |
| INCPAD | 10.4 (9.9) | 15.3 (10.4) | 18.9 (9.8) | 20.5 (8.3) | < .001 |
|
| |||||
| Sheehan Disability Scale | |||||
| INCPAD | 3.3 (2.6) | 4.8 (2.7) | 6.1 (2.6) | 6.9 (2.4) | < .001 |
|
| |||||
| Work Effectiveness | |||||
| SCOPE | 82.0 (18.8) | 73.6 (20.5) | 61.8 (22.9) | 52.9 (26.3) | <.001 |
| ESCAPE | 84.0 (17.8) | 79.9 (18.2) | 74.3 (20.0) | 59.1 (24.5) | < .001 |
*
Analysis of variance was used to compare mean scores across the four categories.