Outcome | Oxygen Group (n = 107) | Placebo Group (n = 110) | P |
---|---|---|---|
Age (y) | 30 (27–32) | 29 (28–31) | 0.62 |
Gestational age (wk) | 40.0 (39.3–40.9) | 40.0 (39.3–40.4) | 0.22 |
Admission BMI (kg/m2) | 25.8 (24.5–27.6) | 26.6 (24.5–28.6) | 0.16 |
Antepartum hemoglobin (g/L) | 127.1 [9.1] | 127.2 [9.8] | 0.93 |
Duration of first stage (min) | 450 (310–590) | 450 (300–660) | 0.76 |
Duration of second stage (min) | 47 (31–67) | 42 (28–58) | 0.29 |
Maternal pH | 7.367 (7.337–7.391) | 7.359 (7.332–7.381) | 0.16 |
Maternal PO2 (mmHg) | 150.0 (142.6–156.7) | 112.0 (104.8–118.3) | < 0.001 |
Maternal PCO2 (mmHg) | 26.1 [4.1] | 27.2 [3.4] | 0.03 |