X
GO

About Youth Tobacco Data

Tracking youth tobacco usage involves collecting self-reported data on tobacco use from students through the Iowa Youth Survey (IYS).

This page provides general information about tobacco data and measures developed by the Iowa Public Health Tracking program. Contact Us for more information about these data.

Information on this page:

What is the source of the data?

The substance use data displayed here are collected through the Iowa Youth Survey (IYS). The IYS is Iowa’s long-running survey that is a near-census of 6th, 8th, and 11th grade students statewide. The IYS is administered every other year with students completing the survey online.

Back to Top

How does IYS collect data?

The IYS is conducted online with a questionnaire of approximately 210 questions.

Back to Top

What time period of data is available?

The Iowa Public Health Tracking portal displays tobacco data from the year 2012 through the most recent year of data available.

Back to Top

How are the measures calculated?

Incidence Rate (Per 100K): The incidence rate is the total number who reported positive to the survey question per 100,000 population.

Back to Top

Can I compare pre-2011 BRFSS data to post-2011 BRFSS data?

A comparison to IYS data not included here is not recommended. Analysis is done for each question to ensure that the question wording and response options were consistent across the reported time period. This is not the case for years not included here.

Back to Top

Where can I find more technical information about the data?

Contact Us to learn more about Youth Tobacco data, or any of the measures displayed on the Iowa Public Health Tracking Portal.

Back to Top

 

About Adult Tobacco Data

Tracking adult tobacco usage involves collecting data about the number of people who reported substance use while participating in the Behavioral Risk Factor Surveillance System (BRFSS) survey.

This page provides general information about youths’ use of alcohol through measures developed by the Iowa Public Health Tracking program. Contact Us for more information about these data.

Information on this page:

What is the source of the data?

The substance use data displayed here are collected through the Behavioral Risk Factor Surveillance System (BRFSS). BRFSS is the nation’s premier system of telephone surveys that collect state-level data about health risk behaviors, chronic health conditions, and use of clinical preventive services among adult U.S. residents.

Back to Top

How does BRFSS collect data?

BRFSS invites a randomly selected sample of Iowan adults to participate in the telephone survey. Recent surveys have included both adults who have landline telephones and cell phone users, and have between 6,000 and 7,700 participants. All responses are weighted to the entire Iowan population so that weighted results are intended to capture the experience of the entire state.

Back to Top

What time period of data is available?

The Iowa Public Health Tracking portal displays tobacco data from the year 2011 through the most recent year of data available.

Back to Top

How are the measures calculated?

Incidence Rate (Per 100K): The incidence rate is the total number who reported positive to the survey question per 100,000 population.

Back to Top

Can I compare pre-2011 BRFSS data to post-2011 BRFSS data?

No. Data from 2011 and later should not be compared to data from before 2011 due to changes in data collection and analysis methodology. Earlier versions of the BRFSS survey only contacted people with landline telephones. Beginning in 2011, BRFSS changed the collection methodology to include cell phones in its sampling frame. In addition, a new method for weighting the sample called iterative proportional fitting or raking was introduced. This methodology better allows data for population subgroups that are underrepresented in the sample to be more accurately represented in weighted estimates. The raking method allows more demographic variables to be used in creating sample weights leading to more accurate estimates.

Back to Top

Where can I find more technical information about the data?

Contact Us to learn more about Adult Tobacco data, or any of the measures displayed on the Iowa Public Health Tracking Portal.

Back to Top