. 2011 Aug 17;15(4):R201. doi: 10.1186/cc10369

Table 3.

Oxygenation and acid-base variables, and fluid balance in all patients, and in survivors and non-survivors.

	Day 0				Day 3				Day 7				Day 10
	All	S	NonS	P	All	S	NonS	P	All	S	NonS	P	All	S	NonS	P
N	178	93	85		152	89	63		129	80	42		73	38	35
PaO₂(mmHg)	97 (71 to 124)	98 (76 to 120)	92 (67 to 129)	.50	94 (76 to 122)	98 (79 to 105)	87 (72 to 117)	.06	96 (79 to 115)	104 (84 to 125)	81 (73 to 102)	.001	96 (73 to 15)	106 (76 to 118)	84 (72 to 110)	.06
PaCO₂(mmHg)	44 ± 14	43 ± 12	46 ± 15	.22	44 ± 13	43 ± 13	46 ± 13	.14	47 ± 11	44 ± 10	51 ± 11	.02	47 ± 13	42 ± 10	52 ± 14	.001
Arterial pH	7.29 ± 0.1	7.31 ± 0.1	7.27 ± 0.1	.007	7.34 ± 0.1 ^a	7.37 ± 0.1	7.29 ± 0.1 ^c	.004	7.36 ± 0.1 ^a	7.39 ± 0.1	7.33 ± 0.1	.002	7.37 ± 0.1 ^c	7.41 ± 0.1	7.32 ± 0.1	.002
HCO₃(mEq/L)	21 ± 5	20 ± 6	22 ± 5	.16	24 ± 5 ^b	24 ± 5 ^a	22 ± 5	.02	27 ± 5 ^a	27 ± 5	28 ± 5 ^b	.55	27 ± 5 ^c	27 ± 5	28 ± 7	.75
Fluid balance (ml/day)	785 (130; 1,802)	715 (98; 1,810)	1,000 (170; 1,800)	.99	1,050 (74; 210)	695 (-86; 2,025)	1,350 (505; 2,560)	.02	900 (-352;-1,785)	700 (-470;-1,770)	1,000 (-172; 1,810)	.75	129 ^b(-673; 1,100)	0 ^b(-800; 1,050)	757 (-450; 1,415)	.07

Data are presented as means ± standard deviations, and medians and (IQR)

NonS, Non-survivors. P, Intergroup comparisons (between survivors vs. non-survivors) at each day are shown. S, Survivors.

For intragroup comparisons over time: Days 3, 7 and 10 are compared to Day 0 values, in all patients, in survivors and in non-survivors.

^aP < .001; ^bP < .01; ^cP < .05