1. MacIntyre NR, Epstein SK, Carson S, Scheinhorn D, Christo-pher K, Muldoon S, et al. Management of patients requiring prolonged mechanical ventilation: report of a NAMDRC consensus conference. Chest 2005; 128:3937-54.

2. Unroe M, Kahn JM, Carson SS, Govert JA, Martinu T, Sathy SJ, et al. One-year trajectories of care and resource utilization for recipients of prolonged mechanical ventilation: a cohort study. Ann Intern Med 2010; 153:167-75.

3. Damuth E, Mitchell JA, Bartock JL, Roberts BW, Trzeciak S. Long-term survival of critically ill patients treated with prolonged mechanical ventilation: a systematic review and metaanalysis. Lancet Respir Med 2015; 3:544-53.

4. Carson SS, Garrett J, Hanson LC, Lanier J, Govert J, Brake MC, et al. A prognostic model for one-year mortality in patients requiring prolonged mechanical ventilation. Crit Care Med 2008; 36:2061-9.

5. Carson SS, Kahn JM, Hough CL, Seeley EJ, White DB, Douglas IS, et al. A multicenter mortality prediction model for patients receiving prolonged mechanical ventilation. Crit Care Med 2012; 40:1171-6.

6. Kim WY, Jo EJ, Eom JS, Mok J, Kim MH, Kim KU, et al. Validation of the Prognosis for Prolonged Ventilation (ProVent)score in patients receiving 14days of mechanical ventilation. J Crit Care 2018; 44:249-54.

7. Mok JH, Kim YH, Jeong ES, Eom JS, Kim MH, Kim KU, et al. Clinical application of the ProVent score in Korean patients requiring prolonged mechanical ventilation: a 10-year experience in a university-affiliated tertiary hospital. J Crit Care 2016; 33:158-62.

8. Park YR, Lee JS, Kim HJ, Hong SB, Lim CM, Koh Y, et al. Modification of the prolonged mechanical ventilation prognostic model score to predict short-term and 1-year mortalities. Respirology 2019; 24:179-85.

9. Roh J, Shin MJ, Jeong ES, Lee K. Association between medical costs and the ProVent model in patients requring prolonged mechanical ventilation. Tuberc Respir Dis 2019; 82:166-72.

10. Boniatti MM, Giustina AD, Marin LG, Franca J, Dos Santos MC, Vidart J, et al. Mortality in chronically critically ill patients:expanding the use of the ProVent score. J Crit Care 2015; 30:1039-42.