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%)


ISP-D: Internet-based Self-assessment Program for Depression.

The presence of depressive symptoms was defined as fulfilling the symptomatic criteria of DSM-IV

Lin et al. BMC Psychiatry 2007 7:12   doi:10.1186/1471-244X-7-12

Open Data