Carbon Dioxide Insufflation in Routine Colonoscopy Is Safe and More Comfortable: Results of a Randomized Controlled Double-Blinded Trial

Table 1

Baseline patient characteristics.

	CO2 group 𝑛=110	Room air group 𝑛=109	𝑃 value
Age	58±13	62±12	.42
Sex	Female: 62%	Female: 47%	.03
BMI	25±4.7	26±4.4	.78
Comorbidity			.36
ASA I	64.5%	61.5%
ASA II	29.1%	26.6%
ASA III	6.4%	11.9%
COPD	2.7%	2.8%	.32
Irritable bowel syndrome	23.6%	12.8%	.03
Indication			.92
Screening	78.2%	79.9%
Surveillance	3.6%	4.6%
IBD	6.4%	4.6%