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Related Concept Videos

Ordinal Level of Measurement00:55

Ordinal Level of Measurement

The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of measurement. For analysis, data are classified into four levels of measurement—nominal, ordinal, interval, and ratio.
Data measured using an ordinal scale are similar to nominal scale data, but there is one major difference. The ordinal scale data can be ordered. An example of ordinal scale data is a list of the top five national parks in the...
Ratio Level of Measurement00:54

Ratio Level of Measurement

The way a set of data is measured is called its level of measurement. Correct statistical procedures depend on a researcher being familiar with levels of measurement. For analysis, data are classified into four levels of measurement—nominal, ordinal, interval, and ratio.
A set of data measured using the ratio scale takes care of the ratio problem and provides complete information. Ratio scale data are like interval scale data, except they have a zero point and ratios can be calculated. For...
Differential Leveling01:12

Differential Leveling

Differential leveling is a precise method in surveying used to determine the elevation difference between two points. Its primary goal is to establish accurate vertical measurements to create level surfaces or grade lines critical for designing and constructing infrastructures such as roads, bridges, and buildings.The procedure for differential leveling begins with setting up and leveling the instrument at a point where the benchmark can be seen. The level rod is held on the benchmark (BM), and...
Levels of Organization01:09

Levels of Organization

Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules comprise...
Traditional Level Of Health Care System01:26

Traditional Level Of Health Care System

The levels of care describe the services provided in the healthcare system. Accordingly, there are six levels of the traditional healthcare system in the US: preventive, primary, secondary, tertiary, restorative, and continuing healthcare. A nurse must understand how the healthcare industry organizes and provides services within these levels of care.
The preventive healthcare service includes tests for screening. Preventive health care services include identifying and reducing disease risk...
Introduction and Methods of Leveling01:26

Introduction and Methods of Leveling

Leveling is a surveying procedure used to determine elevation differences between distant points. Elevation refers to the vertical distance above or below a reference datum, typically mean sea level (MSL). In the United States, elevations are often referenced to the mean sea level station at Father Point Rimouski along the St. Lawrence Seaway. To make the datum accessible, permanent markers are established throughout the region. These markers, called benchmarks, have known elevations. If the...

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Related Experiment Videos

Comparing the standard EQ-5D three-level system with a five-level version.

Mathieu F Janssen1, Erwin Birnie, Juanita A Haagsma

  • 1Public Health Epidemiology, Academic Medical Center, Amsterdam, The Netherlands. m.f.janssen@amc.uva.nl

Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research
|April 3, 2008
PubMed
Summary
This summary is machine-generated.

The new five-level EQ-5D (5L) version is a preferred and more reliable health outcome measure than the three-level EQ-5D (3L). The 5L version demonstrates improved discriminatory power and reliability for health status assessment.

Related Experiment Videos

Area of Science:

  • Health Outcomes Research
  • Psychometrics
  • Quality of Life Measurement

Background:

  • The EQ-5D is a widely used standardized instrument for measuring health status.
  • The three-level version (EQ-5D-3L) has limitations in capturing health state variations.
  • A five-level version (EQ-5D-5L) was developed to enhance measurement properties.

Purpose of the Study:

  • To conduct a head-to-head comparison of the performance of the EQ-5D-3L and the EQ-5D-5L.
  • To evaluate the feasibility, validity, reliability, and discriminatory power of both versions.

Main Methods:

  • Eighty-two respondents evaluated 15 standardized disease descriptions and their own health.
  • Health status was assessed using the EQ-5D-3L, EQ-5D-5L, and Visual Analog Scale (VAS).
  • Key performance indicators included feasibility, face validity, ordinality, convergent validity, discriminatory power, and reliability.

Main Results:

  • The EQ-5D-5L was preferred for feasibility (76%) and face validity (75%).
  • Ordinality was confirmed for EQ-5D-5L; convergent validity with VAS was high for both versions.
  • Discriminatory power significantly improved with EQ-5D-5L, alongside enhanced test-retest and interobserver reliability.

Conclusions:

  • The EQ-5D-5L is a valid and reliable extension of the EQ-5D-3L.
  • The EQ-5D-5L is particularly effective for describing mild health issues and monitoring population health trends.