A patient-centered framework for health systems engineering in gastroenterology: improving inpatient colonoscopy bowel preparation

Table 2 Estimates from generalized linear model for adequate bowel preparations and length of stay before and after the intervention in unadjusted and adjusted models

Study outcome	Pre vs. post	Unadjusted model	Adjusted model
Study outcome	Pre vs. post	Relative risk (post / pre) [95% confidence interval]	Relative risk (post / pre) [95% confidence interval]
Good^† ICBP	60.8% vs. 74.4%	1.873*	1.947*
Good^† ICBP		[1.093,3.211]	[1.025,3.697]
Ideal^‡ ICBP	53.3% vs. 69.0%	1.947*	1.901*
Ideal^‡ ICBP		[1.160,3.266]	[1.024,3.531]

		Ratio of means (post / pre) [95% confidence interval]	Ratio of means (post / pre) [95% confidence interval]
Mean length of stay, days	8 vs. 6	0.759	0.852
		[0.538,1.069]	[0.617,1.179]

Adjusted model includes average weekly occupancy. ICBP: inpatient colonoscopy bowel preparations.
^†Good: colonoscopy delayed and adequate bowel preparation when performed.
^‡Ideal: colonoscopy not delayed and adequate bowel preparation when performed. *p < 0.05

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