Table 1 Demographic and clinical data before and after propensity matching
From: Maintaining moderate versus lower PEEP after cardiac surgery: a propensity-scored matched analysis
Variable | Before Matching | After Matching | ||||
|---|---|---|---|---|---|---|
Lower PEEP (n = 232) | Moderate PEEP (n = 102) | P value | Lower PEEP (n = 79) | Moderate PEEP (n = 79) | P value | |
Female, n (%) | 101 (43.5) | 33 (32.4) | 0.072 | 29 (36.7) | 28 (35.4) | > 0.999 |
Age, years | 57 (46–65) | 58 (48–66) | 0.431 | 59 (52–67) | 56 (47–66) | 0.438 |
BMI, kg/m2 | 23.7 (21.5–25.7) | 24.8 (23.5–27.3) | < 0.001 | 24.4 (22.9–25.9) | 24.6 (22.7–26.8) | 0.591 |
APACHE II score | 12 (9–15) | 11 (9–15) | 0.947 | 13 (10–16) | 11 (9–14) | 0.086 |
Hypertension, n (%) | 103 (44.4) | 48 (47.1) | 0.741 | 44 (55.7) | 37 (46.8) | 0.340 |
Diabetes, n (%) | 51 (22.0) | 27 (26.5) | 0.452 | 18 (22.8) | 17 (21.5) | > 0.999 |
Obstructive lung disease, n (%) | 38 (16.4) | 11 (10.8) | 0.245 | 9 (11.4) | 10 (12.7) | > 0.999 |
Atrial fibrillation, n (%) | 46 (19.8) | 18 (17.6) | 0.752 | 14 (17.7) | 15 (19.0) | > 0.999 |
Chronic heart failure, n (%) | 47 (20.3) | 17 (16.7) | 0.537 | 14 (17.7) | 14 (17.7) | > 0.999 |
LVEF, % | 67 (59–71) | 64 (57–70) | 0.083 | 66 (58–70) | 66 (58–70) | 0.697 |
Pulmonary Hypertension, n (%) | 55 (23.7) | 21 (20.6) | 0.628 | 15 (19.0) | 18 (22.8) | 0.695 |
Type of surgery, n (%) | 0.163 | 0.409 | ||||
Valve | 71 (30.6) | 42 (41.2) | 34 (43.0) | 26 (32.9) | ||
CABG | 58 (25.0) | 23 (22.5) | 19 (24.1) | 21 (26.6) | ||
Others | 103 (44.4) | 37 (36.3) | 26 (32.9) | 32 (40.5) | ||
Duration of CPB, min | 117 (87–148) | 112 (95–138) | 0.846 | 116 (88–144) | 114 (98–137) | 0.946 |
On ICU admission | ||||||
PaO2, mm Hg | 106 (86–129) | 89 (75–119) | < 0.001 | 89 (80–115) | 90 (79–122) | 0.945 |
FiO2, % | 35 (30–40) | 35 (30–40) | 0.415 | 35 (30–40) | 35 (30–40) | 0.607 |
P/F ratio, mm Hg | 311 (246–384) | 259 (209–337) | < 0.001 | 270 (224–326) | 266 (212–341) | 0.921 |
Crs, dyn, mL/cm H2O | 35.5 (30.7–42.2) | 36.5 (32.1–42.9) | 0.292 | 36.8 (30.7–42.5) | 38.2 (33.3–44.2) | 0.223 |
12 h after ICU admission | ||||||
Epinephrine, mcg/kg/min | 0.00 (0.00–0.02) | 0.00 (0.00–0.02) | 0.863 | 0.00 (0.00–0.01) | 0.00 (0.00–0.02) | 0.504 |
Norepinephrine, mcg/kg/min | 0.05 (0.00–0.18) | 0.05 (0.00–0.12) | 0.683 | 0.04 (0.00–0.18) | 0.06 (0.00–0.13) | 0.960 |