Table 1. Colorectal lesion prevalence and basic demographic data for patients in Bavaria who underwent outpatient colonoscopy in 2006.

	Patients in Bavaria who underwent screening colonoscopy in 2006	Patients in Bavaria who underwent "curative" colonoscopy in 2006	ZI figures for 2006 as comparison
Number of cases	54 491	175 611	529 699
Percentage of women	55.80	57.05	54.70
Age (mean ± SD): men	64.9 ± 6.8	57.3 ± 14.6
Age (mean ± SD): women	64.3 ± 6.8	56.3 ± 15.3
Prevalence of low-grade adenomas (%) [95% CI]	17.32 [17.00–17.64]	13.57 [13.41–13.73]	13.70 [13.61–13.79]
Prevalence of advanced adenomas (%) [95% CI] (diameter ≥ 10 mm, high-grade intraepithelial neoplasia, villous or tubulovillous histology, or combination thereof)	7.36 [7.14–7.58]	5.57 [5.46–5.68]	4.00 [3.95–4.05]
Prevalence of carcinoma (%) [95% CI]	1.27 [1.18–1.37]	1.59 [1.53–1.65]	0.90 [0.88–0.92]
Overall prevalence of histologically confirmed adenoma and carcinoma (%) [95% CI]	25.95 [25.58–26.32]	20.73 [20.54–20.92]	22.00 [21.89–22.12]

SD, standard deviation; 95% CI, 95% confidence interval

As comparison: nationwide figures for screening colonoscopy for the year 2006 published by the Central Research Institute of Ambulatory Health Care in Germany (ZI, Zentralinstitut für die kassenärztliche Versorgung) (27).