The independent factors of PRNB at the time of extubation include age over 70 (OR =19.11, 95% CI (3.96 - 92.29), p < 0.05), and neuromuscular function at the time of reversal TOF ≤ 0.5 (OR = 8.81, 95% CI (1.67 - 46.39), p = 0.01).