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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