Table 3 ISP-D test-retest reliabilities for depressive symptoms by test-retest time interval
Depressive symptoms | κ (agreement) by time interval | ||
|---|---|---|---|
|  | <2 weeks (N = 59) | ≥2 to ≤4 weeks (N = 86) | >4 weeks (N = 39) |
Depressed mood | 0.458 (72.9%) | 0.360 (73.3%) | 0.412 (71.8%) |
Diminished interest or pleasure | 0.759 (88.1%) | 0.557 (77.9%) | 0.438 (71.8%) |
Decreased appetite | 0.551 (79.7%) | 0.622 (83.7%) | 0.206 (59.0%) |
Insomnia or hypersomnia | 0.594 (79.7%) | 0.541 (77.9%) | 0.584 (79.5%) |
Activity disturbance | 0.433 (72.9%) | 0.422 (70.9%) | 0.227 (61.5%) |
Fatigue or loss of energy | 0.791 (93.2%) | 0.544 (77.9%) | 0.379 (76.9%) |
Worthlessness or excessive guilt | 0.423 (71.2%) | 0.564 (79.1%) | 0.734 (87.2%) |
Diminished ability to think or concentrate | 0.568 (84.7%) | 0.546 (79.1%) | 0.554 (79.5%) |
Thoughts of death | 0.829 (91.5%) | 0.334 (70.9%) | 0.556 (79.5%) |