Fig. 4From: Dezocine prevents sufentanil-induced cough during general anesthesia induction: a meta-analysis of randomised controlled trialsForest plot of the effect of dezocine compared with placebo on the severity of SIC. The severity of SIC was graded by cough frequency (a. mild (1–2), b. moderate (3–4), c. severe (≥5))Back to article page