Table 3 Discriminative validity of the Insomnia Severity Index Danish version (ISI-DK)
From: Preliminary validation of the insomnia severity index in Danish outpatients with a medical condition
Hypotheses | Mean ISI-DK score (SD) |
|---|---|
Gender: Female responders have significantly higher ISI-DK mean scores compared to male responders | |
Male, n = 91 | 9.36 (6.03) |
Female, n = 158 | 10.74 (6.02) |
Effect size (Cohen’s d) | 0.23 |
p-value | 0.083 |
Confirmed hypothesis | No |
Age: Responders ≥ 70 years old have significantly lower ISI-DK mean scores compared to younger responders | |
≥ 70, n = 60 | 8.85 (6.55) |
≤ 69, n = 188 | 10.65 (5.83) |
Effect size (Cohen’s d) | 0.40 |
p-value | 0.044 |
Confirmed hypothesis | Yes |
EQ VAS: Responders with EQ VAS score < 83.7 have significantly higher ISI-DK mean scores compared to responders with higher EQ VAS scores | |
VAS score ≤ 83.6, n = 189 | 11.21 (6.00) |
VAS score ≥ 83.7, n = 60 | 7.18 (5.13) |
Effect size (Cohen’s d) | 0.69 |
p-value | < 0.001 |
Confirmed hypothesis | Yes |
EQ-5D anxiety/depression: Responders with any EQ-5D anxiety/depression problem have significantly higher ISI-DK mean scores compared to responders with no problem | |
Anxiety/depression no problems, n = 132 | 8.23 (5.66) |
Anxiety/depression problems, n = 117 | 12.50 (5.68) |
Effect size (Cohen’s d) | 0.75 |
p-value | < 0.001 |
Confirmed hypothesis | Yes |
EQ-5D pain/discomfort: Responders with any EQ-5D pain/discomfort problem have significantly higher ISI-DK mean scores compared to responders with no problem | |
Pain/discomfort no problems, n = 64 | 7.44 (5.28) |
Pain/discomfort problems, n = 185 | 11.21 (6.01) |
Effect size (Cohen’s d) | 0.65 |
p-value | < 0.001 |
Confirmed hypothesis | Yes |