965: THE ASSOCIATION BETWEEN VENTILATORY EFFICIENCY, A NONINVASIVE DEAD SPACE METRIC, AND MORTALITY. (15th December 2022) - Bhalla, Anoopindar; Baron, David; Bornstein, Dinnel; Hotz, Justin; Klein, Margaret; Armenta-Quiroz, Anabel; Dawson-Baxter, Dana; Chang, Daniel; Vu, Kennedy; Kwok, Jeni; Kohler, Kristen; Suresh, Anil; et al.