ChiCTR1800016149.

Study name	Randomized control study of early extubation of indwelled urinary catheter after rectal cancer radical operation
Methods	Study design: randomised controlled trial Setting: Sixth Affiliated Hospital of Sun Yat‐sen University, China
Participants	Inclusion criteria: aged 18‐75 years old; pre‐operative fibrosis colonoscopy and pathological biopsy confirmed colorectal cancer as the primary cancer; no difficulty in urination and no UTI before operation; provision of written informed consent Exclusion criteria: patients with colorectal cancer palliative surgery, Miles operation and emergency surgery; patients with obvious urinary diseases including urinary tract stone, tumour, prostatic hyperplasia; patients having a history of urinary enuresis within 72 h; patients with history of pelvic surgery or with severe systemic diseases such as heart, lung, kidney, etc.; patients required lateral lymph node dissection; patients with recurrent rectal cancer or multiple rectal cancer and with other tumour; patient unconscious and unable to express the intention of urination correctly; patients with dementia, stroke or mental illness. Antibiotic treatment was applied 1 week before surgery.
Interventions	Group A: removal of IUC within 24 h directly after surgery Group B: removal of IUC after training bladder function on the 3rd day regularly after surgery
Outcomes	AUR UTI Urethral bleeding Residual volume Urinary incontinence Discomfort of lower urinary tract
Starting date	14 May 2018
Contact information	Tenghui Ma, austin_2004@163.com
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