Table 2.

Comparison of baseline plasma amino acid and NOx levels in patients with and without ARDS

Analyte	ARDS1 n = 44	No ARDS n = 91	P-value
Citrulline, uM	6.0 (3.3 - 10.4)	10.1 (6.2 - 16.6)	0.002
Arginine, uM	19.3 (9.6 - 34.5)	22.9 (14.7 - 40.0)	0.18
Ornithine, uM	23.0 (8.5 - 37.1)	22.3 (16.0 - 43.2)	0.22
NOx	53.8 (24.2 - 92.3)	49.8 (34.5 - 80.9)	0.89

¹Data presented as median (IQR). ARDS, acute respiratory distress syndrome; NOx, total nitrate and nitrite.