La hora de ingesta del polietilenglicol es un factor clave en la tolerancia y eficacia de la preparación del colon en individuos de un programa poblacional de cribado de cáncer colorrectal

Abstract

IntroductionThe quality and tolerability of antegrade gut lavage bowel preparation are key elements in the success of population-based colorectal cancer screening. ObjectivesTo evaluate cleansing quality and tolerability according to the timing of polyethylene glycol administration in persons undergoing colorectal cancer screening. MethodParticipants in colorectal cancer screening were randomized to two groups: a) control group (colonoscopy scheduled at 9-12h); preparation with polyethylene glycol on the previous afternoon; b) study group (colonoscopy scheduled at 12-15h): preparation with polyethylene glycol on the morning of the colonoscopy, with the option of a split dose. The quality of cleansing was evaluated with the Boston scale and tolerability through a questionnaire. ResultsA total of 282 participants were included: preparation was carried out the day before the procedure in 134 and on the same day in 148, of which 26 received a split dose. Cleansing was adequate in 95% (n=268) of the participants. The quality of cleansing was higher in the study group (P=.045). The interval between the end of administration and the beginning of the procedure was inversely correlated with the Boston scale score (P=.036; r=−0.125). Tolerability was unrelated to the time of administration (P>.2). Acceptance of the timing of administration was lower in the study group than in the control group (26% vs 10%, respectively; P=.001). ConclusionsPreparation as close as possible to the colonoscopy improves the quality of cleansing with no detrimental effects on tolerability, although this option is less comfortable.