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Table 2 Procedural characteristics

From: A multi-centre randomised double-blind placebo-controlled trial to evaluate the value of a single bolus intravenous alfentanil in CT colonography

Outcome

Placebo (n = 45)

Alfentanil (n = 45)

P value

Maximum pain score

5.3 (2.5)

3.0 (2.5)

<0.001

Pain score

   

1 right decubitus

1.8 (2.4)

0.4 (1.0)

<0.001

2 supine

3.4 (2.6)

1.4 (2.0)

<0.001

3 left decubitus

5.1 (2.5)

2.6 (2.2)

<0.001

4 prone

3.0 (2.6)

1.6 (2.5)

0.01

Volume CO2 insufflation (litre)

4.6 (1.4)

4.7 (1.2)

0.99

Pressure at end insufflation (mmHg)

22 (20–25)

22 (19–25)

0.81

Procedural time (minutes)

24.4 (4.2)

24.8 (4.7)

0.64

  1. This table provides mean values with the standard deviation between brackets. Except the pressure at the end of insufflation which is a median value with interquartile range.
  2. Pain scores 1, 2 and 3 were asked before performing the scan acquisitions. Pain score 4 was asked with the patient in the prone scan position. No pain score was asked during the supine scan position.