This study aims to describe the pattern of home mechanical ventilation (HMV) usage in Australia and New Zealand.34 centres providing HMV in the region were identified and asked to complete a questionnaire regarding centre demographics, patient diagnoses, HMV equipment and settings, staffing levels and methods employed to implement and follow-up therapy.28 (82%) centres responded, providing data on 2,725 patients. The minimum prevalence of HMV usage was 9