Table 5.

Prognosis for Prolonged Ventilation (ProVent) Score

Provent Score	Development Set			Validation Set
	n (%)	Predicted 1-year Mortality	Observed 1-year Mortality	n (%)	Observed 1-year Mortality
		95% (CI)
0	41 (21)	0.12 (0.06, 0.21)	0.15	14 (14)	0.14
1	98 (50)	0.44 (0.36, 0.53)	0.42	42 (42)	0.43
2	26 (13)	0.83 (0.71, 0.90)	0.88	21 (21)	0.86
3	22 (11)	0.97 (0.90, 0.99)	0.95	13 (13)	1.0
4	9 (5)	0.99 (0.97, 1.0)	1.0	8 (8)	1.0

	Development Set			Validation Set
		Predicted 3-month Mortality	Observed 3-month Mortality		Observed 3-month Mortality
		95% (CI)
0	41 (21)	0.10 (0.05, 0.17)	0.12	14 (14)	0.07
1	98 (50)	0.32 (0.25, 0.40)	0.29	42 (42)	0.38
2	26 (13)	0.67 (0.55, 0.77)	0.77	21 (22)	0.80
3	22 (11)	0.90 (0.78, 0.95)	0.91	13 (14)	0.85
4	9 (5)	0.97 (0.91, 0.99)	0.89	8 (8)	1.0

Variables measured on Day 21 of mechanical ventilation:

Age ≥50 = 1 point

Vasopressor = 1 point

Platelets ≤150 x 10⁹/L = 1 point

Requires Hemodialysis = 1 point