Appropriateness of indication and diagnostic yield of colonoscopy: First report based on the 2000 guidelines of the American Society for Gastrointestinal Endoscopy

Table 7 Odds ratios (OR) and 95% confidence intervals (95% CI) for association between selected clinical parameters and diagnostic yield of colonoscopy

Parameter (n)	Diagnostic yield (%)	OR1 (95% CI2)	P
Gender
Female (321)	26.2	1	-
Male (415)	28	1.1 (0.8-1.5)	>0.50
Age (years)
<50 (472)	23.9	1.0 -
≥50 (264)	33	1.6 (1.1-2.2)	<0.05
Clinical status
Outpatient (606)	25.4	1	-
Inpatient (130)	35.4	1.6 (1.1-2.4)	<0.05
Referring clinician
Other (531)	23.5	1	-
Gastroenterologist (205)	36.6	1.9 (1.3-2.7)	<0.001
Appropriateness of indication3
Generally not indicated (149)	4.7	1	-
Not listed (119)	13.4	3.2 (1.3-7.9)	<0.05
Generally indicated (468)	37.8	12.3 (5.7-27.0)	<0.001

¹OR, odds ratio.

²CI, confidence interval.

³According to 2000 American Society for Gastrointestinal Endoscopy (ASGE) guidelines on appropriate use of gastrointestinal endoscopy[9].