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Table 3 ISP-D test-retest reliabilities for depressive symptoms by test-retest time interval

From: Web-based tools can be used reliably to detect patients with major depressive disorder and subsyndromal depressive symptoms

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%)
  1. ISP-D: Internet-based Self-assessment Program for Depression.
  2. The presence of depressive symptoms was defined as fulfilling the symptomatic criteria of DSM-IV