Cheng CL, Liu NJ, Tang JH, et al. - In this prospective study involving 1,163 patients ≥ 40 years of age (mean age, 55.7 y) with an estimated glomerular filtration rate ≥ 30 mL/min were screened to estimate the risk of renal injury after the use of 3-L polyethylene glycol (PEG) before outpatient colonoscopy. Before, during, and after the colonoscopies, laboratory data were gathered. Findings suggested an association of the use of PEG with a small risk of renal injury. In the context of colonoscopy for which PEG was used for bowel preparation, the use of nonsteroidal anti-inflammatory drugs was statistically correlated with AKI.