Govert Veldhuijzen

43 CAI before colonoscopy is as effective as nurse counselling, a clinical pilot trial RESULTS Patients We included 385 patients, 197 in the nurse counselling group and 188 in the CAI group. The baseline characteristics regarding age, gender, educational level and ethnicity were equally distributed among both groups. Mean age was 57 years (range 18-83) in the nurse counselling group versus 59 years (range 18-89) in the CAI group. Educational levels were representative to the general Dutch population. 20 The majority of the participants were of Dutch ethnicity (87%). (Table 1.) Table 1. Baseline Characteristics Nurse counselling Computer Assisted Instruction Nurse versus Computer Assisted Instruction (statistical test) Gender (n, %)  Male  Female 97 (49.2) 100 (50.8) 90 (47.9) 98 (52.1) p = 0.789 (Chi-Square) Age (mean, range) 57 years, 18-83 59 years, 18-89 p = 0.09619 (t-test) Ethnicity (n, %)  Native Dutch  Other 177 (89.8) 20 (10.2) 163 (86.7) 25 (13.3) P = 0.384 (Chi-Square) Educational level† (n, %)  Low  Middle  High 59 (29.9) 68 (34.5 70 (35.5) 43 (22.9) 68 (36.2) 77 (41.0) P = 0.131 (Mann-Whitney) † Highest completed educational level was split into three levels where ‘low’ comprised no education through to lower secondary education, ‘middle’ comprised upper secondary and middle vocational education, and ‘high’ comprised higher vocational and tertiary education Both groups were also similar in the number of drugs used and recent physician visits. The use of email was comparably high, over 90% in both groups (90.9% versus 94.1% in the CAI group) Overall scoring rate of data collection queries at the chosen time points was 99% at T1, 76.4% at T2 and 69.9% at T3. Patients that did not score at T1, T2 or T3 were not included in the time point analysis. The bowel preparation regime prescribed was picosulfate sodium (99%), in split dose. Two patients received for clinical reasons polyethylene glycol, sodium sulphate, sodium bicarbonate, sodium chloride, potassium chloride. 2