Masip J, Roque M, Sánchez B, Fernández R, Subirana M, Expósito JA. JAMA. 2005 Dec 28;294(24):3124-30
Meta-analysis of 15 relevant randomised controlled trials and systematic reviews comparing NIV to conventional oxygen therapy in patients with acute pulmonary edema. Authors conclude that NIV 'reduces the need for intubation and mortality' in this scenario.
Link to abstract.