Risk factors for postherpetic neuralgia: a meta-analysis based on demographic, clinical features, and treatment characteristics.

Publication bias assessment indicated inconsistent findings: visual inspection of the funnel plot suggested potential positive bias ( Supplementary Figure 8 ), while Egger’s test did not reach statistical significance (p>0.05, Supplementary Information ), indicating no definitive evidence of publication bias.

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Additional comorbidities, including COPD and hypertension, were identified as possible risk factors, while CKD showed only a suggestive trend and did not achieve statistical significance.

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