Table 2. Subject characteristics at onset of acute respiratory distress syndrome.

Group	N	Age	LIS	APACHE II	SAPS II
INH	10	37 [28, 50]	3.0 [2.5, 3.5]	25 [22, 36]	52 [41, 63]
DOD	13	35 [24, 59]	2.5 [2.3, 3.3]	33 [29, 39]*	65 [52, 77]
HEP	7	56 [45, 60]	3.0 [3.0, 3.0]	37 [20, 38]	64 [41, 68]
PAN	16	43 [38, 53]	2.8 [2.5, 3.3]	21 [14, 27]	37 [31, 57]
NEU	8	52 [37, 69]	2.6 [2.3, 3.0]	28 [26, 33]	57 [46, 70]
PERF	9	54 [45, 71]	3.5 [2.6, 3.8]	30 [26, 37]	64 [55, 79]
TRALI	3	42 [38, 51]	3.3 [2.0, 3.8]	14 [12, 17]	31 [26, 33]
TOX	3	49 [26, 59]	2.8 [2.8, 3.3]	29 [28, 31]	42 [42, 47]
H-IM	4	51 [33, 67]	3.1 [2.6, 3.3]	25 [22, 31]	46 [37, 65]
IDIOP	10	55 [53, 61]	2.6 [2.4, 3.3]	23 [19, 33]	55 [36, 74]
P (K-W)		0.11	0.39	0.005	0.09

Data reported as median [25–75% interquartile range]. K-W, Kruskal-Wallis test (Dunn’s post-tests for P<0.05). *, P=0.03 vs. pancreatitis. INH, inhalation injury; DOD, drug overdose; HEP, hepatic failure; PAN, pancreatitis; NEU, non-traumatic acute brain injury; PERF, perfusion-related; TRALI, transfusion related acute lung injury; TOX, toxicity; H-IM, hyper-immune response; IDIO, idiopathic.