Fig. 4From: Association between work-related biomechanical risk factors and the occurrence of carpal tunnel syndrome: an overview of systematic reviews and a meta-analysis of current researchForest plot of TLV for HAL – below AL versus TLV and above. Outcome: CTS. Abbreviations: AL, action limit; CI, confidence interval; CTS, carpal tunnel syndrome; HAL, hand activity level; TLV, threshold limit valueBack to article page