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. 2023 Dec 27;42(3):301–318. doi: 10.1007/s40273-023-01336-w

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Fig. 1 — Frequency of each Quality of Health Economic Studies (QHES) criterion met by included studies. Quality categories (QC): QC1 (total score: 0–25) [red rectangle], QC2 (total score: >25–50) [orange rectangle], QC3 (total score: >50–75) [yellow rectangle], QC4 (total score: >75–100) [green rectangle]