Demographic predictors
Of the 622 children using long-term NIV, 620 (99.7%) had available baseline and long-term follow-up data to be included in the multivariate analysis. Age was a significant predictor of NIV outcomes. Younger kids were more likely to discontinue NIV due to improvement in the underlying condition, with the odds of discontinuing NIV decreasing 5.6% for every one-year increase in age [0.944 (95% CI 0.893 to 0.999), Figure 1]. The odds of switching to IMV/death, or need for hospitalization, decreased with increasing age. As expected, older children were more likely to transition to adult services or out-of-province care [1.314 (95% CI 1.228 to 1.387)]. Sex was not a predictor of NIV outcomes in our cohort.