Table 6. Independent risk factors for hypoxemia: Multivariant analysis (Continued).

Variables (categorical)		Subvariables	Odd ratio		95% CI	P value
Gender						0.6887
		Male	1		Reference
		Female	1.06		0.80–1.42
Alcohol						0.5023
		No	1		Reference
		Yes	0.89		0.63–1.25
Allergy						0.2923
		No	1		Reference
		Yes	1.28		0.81–2.04
Endoscopy						0.0292
		EGD		1	Reference
		Colonoscopy		1.04	0.75–1.46
		EGD+colonoscopy		4.84	1.51–15.5
ASA scores						0.5723
		I		1	Reference
		II		1.13	0.76–1.67
		III		1.4	0.85–2.29
		IV		1.21	0.40–3.69
Lung diseases						0.1499
		No		1	Reference
		COPD		2.02	0.75–5.47
		Chronic bronchitis		1.65	0.88–3.08
		Pulmonary emphysema		2.11	0.59–7.51
		Asthma		2	0.99–4.02
		Others		1.18	0.28–5.04
Other preexisting diseases						0.0094
		No		1	Reference
		Hypertension		2.28	1.44–3.60	0.0004
		Diabetes		2.37	1.29–4.34	0.005
		CHF		1.88	0.81–4.34	0.1407
		Stroke		2.07	0.76–5.67	0.1557
		Liver cirrhosis		1.70	0.69–4.18	0.2459
		GI diseases		1.77	1.21–2.60	0.0033
		Cancer		1.58	0.48–5.11	0.4494
		Heart diseases		1.97	1.06–3.68	0.0325

CHF Chronic Heart Failure, COPD Chronic Obstructive Pulmonary Disease, EGD Esophagogastroduodenoscopy, GI gastrointestinal.