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HADS scores as a function of pain intensity in patients with PTTN (n = 9). (A) Anxiety scores (HAD-A). (B) Depression scores (HAD-D). Pearson's correlation coefficients suggest a weak correlation between HADS and NRS scores. NRS = Numerical Rating Scale (0–10); HADS = Hospital Anxiety and Depression Scale: scores between 7 and 10 suggest probable anxiety/depression, over 10 certain anxiety/depression.

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