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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: J Surg Oncol. 2017 Feb 10;115(4):402–406. doi: 10.1002/jso.24534

Table 2.

Adjusteda mean outcomes by method of pain control.

6 hr postoperative
pain score		 12 hr postoperative
pain score		 24 hr postoperative
pain score		 48 hr postoperative
pain score		 Length of stayb 24 hr postoperative
fluids (mL)
Adjusted
Mean		 P
value		 Adjusted
Mean		 P
value		 Adjusted
Mean		 P
value		 Adjusted
Mean		 P
value		 Adjusted
Mean		 P
value		 Adjusted
Mean		 P
value
IVPCA 2.42 0.201 2.40 0.859 2.21 0.169 2.54 0.857 1.62 0.252 4196 0.336
TEA 1.51 2.55 3.20 2.42 1.76 4505

IVPCA: intravenous patient-controlled analgesia

a

Models are adjusted for OR time, estimated intraoperative blood loss, postoperative vasopressor requirement, surgical approach (minimally invasive or open), and extent of liver resection (major or minor).

b

Log-transformed to satisfy normality assumption.