"" Using Data to Improve Care for Children EKG
Home >

Validation of Continuous Variables

A bunch of numbers.Continuous variables are numeric variables; variables that would make sense for you to add, subtract, multiply or divide. You can count, order and measure continuous data. Some examples of continuous variables are:

  • age
  • height
  • weight
  • temperature
  • the amount of sugar in an orange
  • the time required to run a mile.

Typical Validation Procedures

Typical validation procedures for continuous variables are checking the minimum value, the maximum value, the mean, and the median.  Let’s look at an example. 

Example: Suppose you are working with hospital data and one of the variables you are interested in is a patient’s length of time living at their current residence.  So, the first thing you do is find the minimum and maximum values of length of time at their current address. 

Your results are:

  • Min:  .05 years
  • Max: 47 years

This seems reasonable; some people will have lived at their current address for a very long time, and others may have just moved into their home. 

What If It Doesn't Seem Reasonable?

What if you ran the same check as the above example and instead of getting those results, you got the following results:

Length at Residence (yrs)

Lowest Values

Highest Values




Does this result make sense? You might immediately be concerned that the lowest values are negative.  How can someone have lived at their current address for a negative amount of time?  It appears something may have happened to the data, and this should be looked into to see if it can be fixed, and the real data recovered. 


Next StepValidation of Categorical Variables >>






rev. 04-Aug-2022




You Might Also Like

Resource Library

Link 1
(Description of link)


Disclaimer | Website Feedback | U of U
© NEDARC 2010

This website is supported by the Health Resources and Services Administration (HRSA) of the U.S. Department of Health and Human Services (HHS) as part of the Emergency Medical Services for Children Data Center award totaling $3,200,000 with 0% financed with non-governmental sources. The contents are those of the author(s) and do not necessarily represent the official views of, nor an endorsement, by HRSA, HHS, or the U.S. Government. For more information, please visit HRSA.gov.

(In accordance with the Americans with Disabilities Act, the information in this site is
available in alternate formats upon request.)