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Table 1 Patient characteristics

From: Efficacy of programmed intermittent bolus epidural analgesia in thoracic surgery: a randomized controlled trial

  PIB (n = 21) mean ± SD CEI (n = 21) mean ± SD P-value
Age (years) 63 ± 2.8 67 ± 2.6 0.34
BMI (kg/m2) 24.5 ± 1.1 22.4 ± 0.5 0.08
SBP (mmHg) 122 ± 2 121 ± 2 0.72
Use of analgesics during the operation
 Fentanyl (μg) 171 ± 35 193 ± 35 0.67
 Remifentanil (mg) 1.5 ± 0.2 1.8 ± 0.2 0.32
Operation time (min) 249 ± 20 263 ± 18 0.61
Anesthesia time (min) 334 ± 22 351 ± 18 0.56