Fig. 2

Excellent intubating conditions with the standard regimen of succinylcholine (1.0 mg kg^− 1) compared with different experimental regimens. Comparisons are listed according to increasing experimental doses. ARD = absolute risk difference; NNT = number needed to treat; CI = confidence interval; ∞ = infinity (i.e. ARD = 0). A positive ARD suggested that an outcome was improved with an experimental regimen compared with the standard regimen and was consequently translated into a positive NNT. A negative ARD suggested that an outcome was worsened with an experimental regimen compared with the standard regimen and was consequently translated into a negative NNT (which may be interpreted as a “number needed to harm”). An ARD of 0, indicating no difference between the experimental and the standard regimen, was translated into an NNT of infinity (∞)