Effects of Interscalene Nerve Block for Postoperative Pain Management in Patients after Shoulder Surgery

Table 1

General characteristics of patients.

Parameters	PCAIB group	PCA group
Gender			0.595
Female	32 (31.%)	17 (35%)
Male	71 (69%)	31 (65%)
Age (year)	59.4 ± 12.2	57.8 ± 12.1	0.442
Weight (kg)	63.2 ± 11.7	63.6 ± 12.6	0.826
Surgical procedure			0.727
Open	42 (41%)	21 (44%)
Arthroscopy	61 (59%)	27 (56%)
Surgical time (min)	84 ± 25	77 ± 27	0.147
Anesthesia time (min)	143 ± 44	132 ± 31	0.115
American Society of Anesthesiologists (ASA) physical status			0.823
I	18 (18%)	7 (15%)
II	73 (71%)	34 (71%)
III	12 (12%)	7 (15%)
Preoperative evaluation
UCLA preoperative score	8.2 ± 3.1	8.1 ± 2.5	0.873
Preoperative forward elevation (deg.)	87.5 ± 19.1	90.0 ± 20.6	0.665
Preoperative external rotation (deg.)	42.9 ± 4.9	42.7 ± 5.1	0.795

Continuous variables were described as the mean ± standard deviation, and the categorical variable was described as number of events (/%); the remaining parameters were compared using an independent -test, and statistical significance was considered when < 0.05.
UCLA preoperative score: University of California at Los Angeles Shoulder Score.
PCAIB: patients with interscalene block in combination with intravenous patient-controlled analgesia.
PCA: patients receiving intravenous patient-controlled analgesia alone without interscalene block.