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Table 7 Comparison of proposed severity categories for R8 Depression to established severity categories

From: Validation of a novel online depression symptom severity rating scale: the R8 Depression

NICE depression severity R8 Depression score PHQ-9 QIDS
Depression severity Score Depression severity Score
None < 17 Minimal depression 0–4 None 0–5
Mild ≥ 17 and < 28 Mild 5–9 Mild 6–10
Moderate ≥ 28 and < 50 Moderate and Moderately severe 10–19 Moderate and Severe 11–20
Severe ≥ 50–100 Severe 20–27 Very severe 21–27