Fig. 3
From: Risk factors and prognosis of pain events during mechanical ventilation: a retrospective study
Kaplan-Meier plots showing the relationship between pain event and patient outcome. Solid lines demonstrate patients in the control group; dotted lines demonstrate patients in the pain episode group. a Mortality rate up to 30 days after the initiation of mechanical ventilation. Mortality rate was significantly lower in the control group compared to that in the pain event group (p = 0.0028, log-rank test). b Time to successful weaning from mechanical ventilation. Time to successful weaning was significantly shorter in the control group compared to that in the pain event group (p = 0.046, log-rank test). c Length of ICU stay. Length of ICU stay did not differ significantly between the two groups (p = 0.077, log-rank test)