Interrupted time series analysis for neuromuscular blocking drugs. Interrupted time series analysis for rocuronium, vecuronium, atracurium, and suxamethonium. For each plot, the vertical gray area is a 1-month period surrounding implementation of the cognitive aid, the red circles are the raw data, the solid line is the fitted regression line (Poisson for rocuronium and vecuronium; Negative Binomial for atracurium and suxamethonium), and the dashed line is the projected trend assuming there was no cognitive aid (counterfactual).