Variable

Epidural anesthesia

(n = 112)

Spinal anesthesia

(n = 50)

General anesthesia

(n = 21)

Adjusted Mean Difference* between Epidural and General

Adjusted Mean Difference* between Spinal and General

N, Mean (SD)

N, Mean (SD)

N, Mean (SD)

Mean Difference (SE)

P-value

Mean Difference (SE)

P-value

Arterial Cord pH

105, 7.22 (0.08)

45, 7.17 (0.11)

17, 7.20 (0.12)

0.02 (0.03)

0.68

−0.03 (0.03)

0.44

Venous Cord pH

101, 7.26 (0.08)

47, 7.22 (0.11)

21, 7.23 (0.11)

0.03 (0.22)

0.25

−0.005 (0.02)

0.96