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Table 2 Propofol EC50, anesthesia related adverse events and recovery time (n = 30 in each)

From: The median effective concentration (EC50) of propofol with different doses of fentanyl during colonoscopy in elderly patients

  Control Group F0.5 group F1.0
Propofol EC50 (μg.ml−1) 3.08 2.75 2.05*
95 % CI (μg.ml−1) 2.78–3.42 2.50–3.02 1.98–2.13
Adverse events
 Hypotension 2 1 1
 Bradycardia 2 3 1
 Respiratory depression 1 1 2
 PONV 2 3 6 *
 Total 7 (23.3 %) 8 (26.7 %) 10 (33.3 %)
 Awake time (min) 6.2 ± 2.4 7.8 ± 3.1 9.6 ± 3.8*
 Hospital discharge (min) 35.7 ± 5.9 38.2 ± 7.5 47.6 ± 10.2*
  1. Values are expressed as mean ± SD or number of patients
  2. * P < 0.05