Predictor | Type of data | Method of measurement | Range of values and coding of predictors |
---|---|---|---|
PHQ-9 score at point of remission (residual depressive symptoms) | Continuous | PHQ-9 score at remission (t=0) | Range from 0 to 9 |
Number of previous episodes of depression | Categorical | Patient or GP report (No previous episodes vs any previous episodes) | No previous episodes=0; 1 or more previous episodes=1 |
Comorbid anxiety | Continuous | GAD-7 Score | 0–21 |
Severity of episode | Continuous | PHQ-9 score at baseline | 10–27 |
RCT intervention | Categorical | Presence or absence of effective treatment | Remission after receiving control=0; Remission after receiving intervention=1 |