Predictors for invasive home mechanical ventilation duration in bronchopulmonary dysplasia

Background: Children with bronchopulmonary dysplasia (BPD) who require invasive home mechanical ventilation (IHMV) are medically vulnerable and experience high caregiving and healthcare costs. Predictors for duration of IHMV in children with BPD remain unclear, which can make prognostication and decision-making challenging. Methods: A retrospective cohort study of children with BPD requiring IHMV was conducted from independent children's hospital records (2005–2021). The primary outcome was IHMV duration, defined as time from initial discharge home on IHMV until cessation of positive pressure ventilation (day and night). Two new variables were included: discharge age corrected for tracheostomy (DACT) (chronological age at discharge minus age at tracheostomy) and level of ventilator support at discharge (minute ventilation per kg per day). Univariable Cox regression was performed with variables of interest compared to IHMV duration. Significant nonlinear factors (p < 0.05) were included in the multivariable analysis. Results: One-hundred-and-nineteen patients used IHMV primarily for BPD. Patient median index hospitalization lasted 12 months (interquartile range [IQR] 8.0,14.4). Once home, half of the patients were weaned off IHMV by 36.0 months and 90% by 52.2 months. Being Hispanic/Latinx ethnicity (hazard ratio [HR] 0.14 (95% confidence interval [CI] 0.04, 0.53), p < 0.01) and having a higher DACT were associated with increased IHMV duration (HR 0.66 (CI 0.43, 0.98), p < 0.05). Conclusions: Disparity in IHMV duration exists among patients using IHMV after prematurity. Prospective multisite studies that further investigate new analytic variables, such as DACT and level of ventilator support, and address standardization of IHMV care are needed to create more equitable IHMV management strategies.