The study by Nanjin Chen et al provided interesting and novel data on the effective dose and gender differences of alfentanil in painless bronchoscopy, and their results suggested that there were no o
S1 Text. R codes. S1 Table. Interaction analysis of sex and age in the adjusted Fine-Gray model based on age cutoff of 50. S2 Table. Interaction analysis of sex and age in the adjusted Cox model based
