Table 3 Comparisons of physiological parameters between noninvasive ventilation and control groups
Variables | Group | Baseline (n = 102/98) | 2 h (n = 102/98) | 12 h (n = 102/98) | 24 h (n = 99/95) | 48 h (n = 98/94) | 72 h (n = 96/93) | pa |
|---|---|---|---|---|---|---|---|---|
PaO2/FiO2, mmHg | NIV | 232 (35) | 246 (72) | 244 (79) | 247 (73) | 260 (81) | 273 (79) | .00 |
Control | 231 (28) | 217 (59) | 223 (76) | 230 (76) | 241 (76) | 250 (85) | .02 | |
pc | .96 | .00 | .06 | .12 | .09 | .06 | .02b | |
pH | NIV | 7.45 (0.05) | 7.44 (0.05) | 7.44 (0.04) | 7.37 (0.76) | 7.44 (0.05) | 7.44 (0.04) | .82 |
Control | 7.45 (0.05) | 7.45 (0.05) | 7.44 (0.05) | 7.44 (0.05) | 7.44 (0.04) | 7.44 (0.04) | .56 | |
pc | .24 | .42 | .99 | .34 | .33 | .65 | .31b | |
PaCO2, mmHg | NIV | 34.5 (5.7) | 34.9 (5.9) | 36.6 (10.2) | 35.2 (6.7) | 36.0 (6.1) | 36.8 (5.4) | .11 |
Control | 33.5 (4.8) | 33.9 (5.6) | 34.6 (5.4) | 36.3 (10.2) | 36.6 (6.6) | 36.8 (5.5) | .00 | |
pc | .19 | .26 | .09 | .39 | .52 | .98 | .68b | |
PaO2, mmHg | NIV | 107 (22) | 99 (26) | 96 (29) | 96 (23) | 99 (27) | 100 (26) | .05 |
Control | 110 (19) | 92 (27) | 91 (27) | 90 (27) | 94 (27) | 93 (24) | .00 | |
pc | .17 | .06 | .19 | .13 | .24 | .07 | .09b | |
RR, breaths/min | NIV | 25.4 (6.2) | 24.5 (5.1) | 22.8 (4.7) | 23.2 (4.8) | 22.6 (4.5) | 21.9 (4.5) | .00 |
Control | 25.0 (4.9) | 24.0 (3.9) | 23.4 (4.6) | 22.9 (3.5) | 22.4 (3.2) | 21.5 (3.2) | .00 | |
pc | .57 | .43 | .35 | .59 | .68 | .48 | .57b |