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Table 2 Summary of selected predictors

From: The development and validation of a prognostic model to PREDICT Relapse of depression in adult patients in primary care: protocol for the PREDICTR study

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