Table 2

Procedural characteristics
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

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.

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.

Boellaard et al.

Boellaard et al. BMC Gastroenterology 2013 13:94   doi:10.1186/1471-230X-13-94

Open Data