Clinical Study
Effects of Interscalene Nerve Block for Postoperative Pain Management in Patients after Shoulder Surgery
Table 2
Preoperative comorbidities.
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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. |