Advantages of new generation colonoscopes on adenoma detection: A propensity-score matching study

Table 1 Baseline characteristics before and after matching

	Before matching		After matching
	290 series	New scope	290 series	New scope
n	3162	3852	2138	2138
Age (years)	55.1	55.4	55.6	55.3
Male sex (%)	58.9	29.9	44.1	46.9
Indication (screening/symptom/abnormal test results/surveillance)	894/513/275/1480	945/619/550/1737	583/316/201/1038	538/347/303/950
Endoscopists with high adenoma detection rate (%)	73.0	87.4	81.0	81.2
Preparation (excellent + good/poor)	2740/422	3473/379	1884/254	1857/281
Texture and color enhancement imaging (%)	73.6	85.0	82.1	80.9
Computer-aided detection system (%)	38.5	62.5	48.2	45.9

Table 2 Comparisons of polyp detection and procedure time between new and 290 series colonoscopes

	290 series	New scope	Odds ratio	95%CI lower	95%CI upper	P value
n	2138	2138
Adenoma detection rate (%)	45.5	51.5	1.2712	1.1273	1.4335	< 0.001
SDR (%)	5.7	7.8	1.4124	1.1087	1.7992	0.005
Adenoma and SDR (%)	48.7	55.7	1.3228	1.1729	1.4919	< 0.001
Clinically significant serrated polyp detection rate (%)	9.8	14.2	1.5240	1.2635	1.8383	< 0.001
Adenomas per colonoscopy	0.76	0.90	1.1105	1.0542	1.1699	< 0.001
Sessile serrated lesions per colonoscopy	0.07	0.10	1.3089	1.0891	1.5731	0.004
Withdrawal time (minutes)	13.7	13.4	0.9860	0.9717	1.0005	0.0575

P value was calculated using a binomial logistic regression model. CI: Confidence interval; SDR: Sessile serrated lesions detection rate.