Colonoscopic polyp detection rate is stable throughout the workday including evening colonoscopy sessions

Colonoscopy quality is often measured using polyp detection rate (PDR). Prior research has shown that factors like time of day and procedure order may influence this metric. However, no prior work had resolved whether evening procedures might lead to lower detection rates. Standardization of procedures is important in maintaining consistent outcomes. Variations in patient demographics and endoscopist experience can affect PDR. Understanding how timing influences performance is crucial for optimizing endoscopy services. Some studies suggest that fatigue may reduce diagnostic accuracy. Others find no significant differences across shifts. This gap motivated further investigation into evening colonoscopy efficacy.

This study aimed to determine if evening colonoscopy sessions reduce PDR compared to morning and afternoon sessions. The specific problem addressed was whether time of day affects colonoscopy performance in real-world settings. Researchers sought to examine if evening procedures are as effective as earlier ones. They wanted to assess if fatigue or other factors lower detection rates after hours. The motivation was to evaluate whether evening sessions could meet rising endoscopy demand. By analyzing NHS outpatient data, they tested if timing influences PDR. The study also aimed to identify other factors influencing detection rates. This approach helps inform scheduling decisions in clinical practice.

The study analyzed 2576 NHS outpatient colonoscopies from 2011 at Norfolk and Norwich University Hospital. Procedures were categorized as morning, afternoon, or evening based on timing. Demographic data, indication for procedure, and findings were recorded. Multivariate regression was used to assess PDR differences across sessions. Covariates like age, gender, and caecal intubation success were included. Researchers compared odds ratios for detection in different time periods. They also examined the impact of procedure rank within a list. Statistical adjustments controlled for confounding variables.

Overall PDR was 40.80% across all sessions. Males, older patients, and those with successful caecal intubation had higher detection rates. 'Faecal occult blood screening' showed the strongest positive association (p<0.001). 'Polyp surveillance' also increased detection rates (p<0.001). Conversely, 'anaemia' as an indication reduced detection (p=0.01). Adjusted analysis found no significant difference in PDR between morning and afternoon (OR=0.93). Evening sessions showed an odds ratio of 1.15 compared to morning. These results suggest time of day does not affect detection rates.

The authors found no significant decline in PDR during evening colonoscopy sessions. Their analysis showed equivalent efficacy compared to morning and afternoon procedures. Standardization across sessions helped maintain consistent outcomes. Variations in demographics and endoscopist experience were accounted for. Evening sessions were popular among younger patients. The study supports scheduling evening procedures to meet demand. No evidence suggests fatigue reduces detection rates after hours. These findings imply evening colonoscopy is a viable option in clinical practice.