From September 9th, 2004 to July 12th, 2005, 800 consecutive outpatient colonoscopies were performed by one gastroenterologist .
 
Gender
There were 384 females (48%) and 416 males (52%).
 
Age
Average age was 56.65 years (17-94). Females 55.61 years (22-94) and males 57.61 (17-84). No statistical difference.
 
Pain score
Overall 1.255 (0-7) Females 1.5 (0-7) Males 1.00 (0-6.5) p<0.001
 
Medication
Versed average 2.475mg (0-6.5) Female 2.516 mg (0-6.5) Male 2.438 mg (0-6)
Fentanyl average 122.25 mg (0-200) Female 131.771 mg(0-200) Male 113.462 mg (0-200)
 
Procedure Time
Overall average 17.255 minutes
Female 18.08 minutes (10-35) 
Male 16.49 minutes (11-36)
P<0.001
 
Findings
-- Cancer
8 adenocarcinomas were found, equally divided by gender with an overall rate of 1% of procedures.
-- Polyps
209 polyps were detected (28.5%)
Female 84 (21.8%)
Male 125 (30.0%)
P<0.001
 
Incomplete evaluation
8 patients (1%) had incomplete colonoscopies: 4 patients (0.5%) had poor preparation (2 female, 2 male), 1 male (0.125%) had diverticulitis and the procedure was discontinued, 2 females (0.25%) had long tortuous colons and the cecum was not satisfactorily seen. A single scope failure occurred in a male patient (0.125%).
 
Excluding poor preparation and the single cases of diverticulitis and scope failure, completion rate was 99.75%.