Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Reaction Rate02:53

Reaction Rate

66.1K
The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
66.1K
Rate-Determining Steps03:08

Rate-Determining Steps

37.6K
Relating Reaction Mechanisms
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
37.6K
Related Rates01:18

Related Rates

61
When two or more physical quantities are linked by a single relationship, a change in one variable necessarily affects the others. This interdependence forms the basis of related rates analysis, which examines how different quantities change with respect to time. A classic physical example is an expanding balloon, where the size of the balloon changes continuously as air is added.For a hot air balloon, the inflated envelope is commonly idealized as a perfect sphere to simplify mathematical...
61
Speciation Rates01:07

Speciation Rates

23.0K
Overview
23.0K
Measuring Reaction Rates03:09

Measuring Reaction Rates

31.5K
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
31.5K
Concentration and Rate Law03:03

Concentration and Rate Law

40.9K
The rate of a reaction is affected by the concentrations of reactants. Rate laws (differential rate laws) or rate equations are mathematical expressions describing the relationship between the rate of a chemical reaction and the concentration of its reactants.
For example, in a generic reaction aA + bB ⟶ products, where a and b are stoichiometric coefficients, the rate law can be written as:
40.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Do "Developing" Countries Become "Developed"? Lessons from <italic>Helicobacter pylori</italic> Infection Recurrence Rate after Eradication.

Digestive diseases (Basel, Switzerland)·2026
Same author

Can Video Capsule Endoscopy Replace Biopsy in the Diagnosis of Celiac Disease?

The Israel Medical Association journal : IMAJ·2026
Same author

[Treatment Safety and Risk Management in Medicine Taught in Medical Schools in Israel, Compared to the U.S.]

Harefuah·2026
Same author

Freezing while preserving achievements: suspending quality indicators in healthcare, Israel's experience.

International journal for quality in health care : journal of the International Society for Quality in Health Care·2025
Same author

Comparison of Outcomes of Chronic Obstructive Pulmonary Disease Patients Hospitalized in Hospital-at-Home vs. In-hospital Settings: A Systematic Review and Meta-analysis.

The Israel Medical Association journal : IMAJ·2025
Same author

Polyp detection rate changed between shifts.

The Israel Medical Association journal : IMAJ·2025

Related Experiment Video

Updated: Feb 16, 2026

A High Performance Impedance-based Platform for Evaporation Rate Detection
06:39

A High Performance Impedance-based Platform for Evaporation Rate Detection

Published on: October 17, 2016

6.9K

Polyp detection rate may predict adenoma detection rate: a meta-analysis.

Yaron Niv1

  • 1Department of Gastroenterology, Rabin Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.

European Journal of Gastroenterology & Hepatology
|January 3, 2018
PubMed
Summary

A conversion factor of 0.688 can estimate adenoma detection rate (ADR) from polyp detection rate (PDR). This ratio aids endoscopists in performance assessment before pathology results are available.

More Related Videos

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver
14:28

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver

Published on: June 27, 2025

1.1K
Automated Detection and Analysis of Exocytosis
13:28

Automated Detection and Analysis of Exocytosis

Published on: September 11, 2021

4.0K

Related Experiment Videos

Last Updated: Feb 16, 2026

A High Performance Impedance-based Platform for Evaporation Rate Detection
06:39

A High Performance Impedance-based Platform for Evaporation Rate Detection

Published on: October 17, 2016

6.9K
Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver
14:28

Software for Analysis of Heart Rate and Blood Pressure Time-series Data from the Valsalva Maneuver

Published on: June 27, 2025

1.1K
Automated Detection and Analysis of Exocytosis
13:28

Automated Detection and Analysis of Exocytosis

Published on: September 11, 2021

4.0K

Area of Science:

  • Gastroenterology
  • Endoscopy
  • Medical Statistics

Background:

  • Adenoma Detection Rate (ADR) is a key metric in colonoscopy quality assessment.
  • Estimating ADR from Polyp Detection Rate (PDR) offers a potential shortcut for performance evaluation.

Purpose of the Study:

  • To meta-analyze the correlation between ADR and PDR.
  • To assess the relative ratio for accurate ADR estimation from PDR.

Main Methods:

  • Systematic literature search for studies correlating PDR and ADR.
  • Meta-analysis of 25 studies (42 datasets, 31,623 patients) using comprehensive meta-analysis software.

Main Results:

  • A fixed-model meta-analysis yielded a relative ratio of 0.688 (95% CI: 0.680-0.695, P<0.0001) for ADR calculated from PDR.
  • Significant heterogeneity was observed between studies (I²=91.679).
  • No significant publication bias was detected.

Conclusions:

  • The ratio of 0.688 provides a reliable method to estimate ADR from PDR.
  • This estimation can be used by individual or groups of endoscopists prior to pathology confirmation.