Table 1 Psychometric Properties Assessed in the Cross-sectional Study and ENSEMBLE2 Phase 3 Trial
Psychometric analyses | Cross-sectional study | ENSEMBLE2 |
|---|---|---|
Item-level descriptive statistics | X | |
Inter-item correlations | X | |
Item-level construct validity | X | |
Item-level known-groups (discriminating ability) | X | |
Test-retest reliability | X | |
Scoring | Preliminary | Confirmatory |
Internal consistency reliability | X | X |
Composite-level descriptive statistics | X | |
Composite-level construct validity | X | |
Composite-level known-groups (discriminating ability) | X | X |
Composite-level ability to detect change (responsiveness) | X | |
Meaningful change thresholds (based on global severity item) | X |