Adenoma detection rate as a quality indicator for colonoscopy.


  • Naik Muhammad Liaquat National Hospital, Karachi.
  • Mansoor-Ul-Haq Liaquat National Hospital, Karachi.
  • Tauqeer Shaikh Liaquat National Hospital, Karachi.
  • Atif Ali Hashmi Liaquat National Hospital, Karachi.



Adenoma, Colorectal Cancer, Carcinoma, Colonoscopy, Polyp


Objective: To determine the quality of colonoscopy in terms of adenoma detection rate in the existing local settings. Study Design: Cross-sectional study. Setting: Department of Gastroenterology, Liaquat National Hospital, Karachi, Pakistan. Period: February 2022 to August 2022. Methods: We analyzed patients having age 18 years or older, of any gender, and who had colonoscopy indications and were required to have a screening colonoscopy for diagnostic purposes. The number of procedures with at least one polyp or adenoma was classified as the polyp detection rate (PDR) and adenoma detection rate (ADR). Result: Total 210 patients were enrolled into the study with median age of 41.5 (29.8-56.3) years and majority were males (n=46, 69.5%). The most frequent indication for colonoscopy was constipation (n=72, 34.3%) followed by bleeding (n=78, 37.1%), chronic diarrhea (n=36, 17.1%), both constipation and diarrhea (n=21, 10%) and altered bowel habits (n=3, 1.4%). PDR and ADR were 16.2% (n=34) and 10% (n=21) respectively. Age was significantly higher among patients who were found to have polyp (p<0.001) and adenomas (p<0.001). Frequency of polyps (p=0.010) and adenomas (p=0.007) were significantly higher in male patients. Conclusion: The current research discovered a low rate of adenoma detection in people receiving colorectal cancer screening, and it did not meet the quality benchmarks that have been associated with higher rates of early diagnosis and cancer prevention.

Author Biographies

Naik Muhammad, Liaquat National Hospital, Karachi.

MBBS, FCPS-I, Post-graduate Resident Gastroenterology, 

Mansoor-Ul-Haq, Liaquat National Hospital, Karachi.

FCPS (Medicine), FCPS (Gastroenterology), Professor and Head Gastroenterology, 

Tauqeer Shaikh, Liaquat National Hospital, Karachi.

FCPS (Gastroenterology), Senior Registrar Gastroenterology, 

Atif Ali Hashmi, Liaquat National Hospital, Karachi.

FCPS (Histopathology), Associate Professor Histopatholgoy,