Clinical Study

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

Table 2

Preoperative comorbidities.

Preoperative comorbidityPCAIB groupPCA group

Cardiovascular system
 Hypertension 42 (41%)21 (44%)0.726
 Arrhythmia 9 (9%)9 (19%)0.105
Respiratory system
 Asthma6 (6%)4 (8%)0.727
Gastrointestinal system
 Hepatitis 13 (13%)7 (15%)0.741
 Gastric ulcer13 (13%)6 (13%)0.983
Urologic system
 Renal syndrome4 (4%)1 (2%)1.000
Endocrine system
 DM19 (18%)8 (17%)0.790
Thromboembolic events
 Cerebral embolism2 (2%)1 (2%)1.000
 Myocardial infarction3 (3%)2 (4%)0.653
 Smoking 64 (62%)30 (63%)0.966

Categorical variables as number of events (); Chi-square test was used, events less than 5 were compared with Fisher’s exact test, and statistical significance was considered when < 0.05.
PCAIB: patients with interscalene block in combination with intravenous patient-controlled analgesia.
PCA: patients receiving intravenous patient-controlled analgesia alone without interscalene block.