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Increase successful quit attempts in pregnant women who smoke — TU‑15 Data Methodology and Measurement

About the National Data

Data

Baseline: 20.2 percent of females reported smoking cessation during pregnancy (i.e., they had smoked in their first or second trimesters but reported no smoking in their third trimester) in 2018

Target: 24.4 percent

Numerator
Number of live births to females who reported smoking cigarettes at any time during the first and/or second trimester and reported not smoking during the third trimester of their pregnancy.
Denominator
Number of live births to females who reported smoking at any time during the first or second trimester.
Target-setting method
Percentage point improvement
Target-setting method details
Percentage point improvement from the baseline using Cohen's h effect size of 0.10.
1
Target-setting method justification
This method was selected because of a change in the data definition which excludes records with gestational age <27 weeks. A percentage point improvement was calculated using Cohen's h effect size of 0.1. This method was used because the Healthy People 2030 Workgroup Subject Matter Experts viewed this as an ambitious yet achievable target.

Methodology

Questions used to obtain the national baseline data

(For additional information, please visit the data source page linked above.)

From the 2018 National Vital Statistics System: Natality:

Numerator and Denominator:
First three months of pregnancy: # of cigarettes: __________ or # of packs: __________
Second three months of pregnancy: # of cigarettes: __________ or # of packs: __________
Third trimester of pregnancy: # of cigarettes: __________ or # of packs: __________

Methodology notes

All entries are converted to the number of cigarettes (1 pack = 20 cigarettes). An entry of "0" indicates no cigarette use at that time period. If a mother reports smoking at any time during the three trimesters of pregnancy she is classified as a smoker (smoked anytime during pregnancy). Women with unknown smoking status for any trimester who report not smoking in the remaining trimesters are classified as "unknown smoking status". Women who report smoking in the three months prior to pregnancy but report not smoking during all three trimesters are considered to have quit before pregnancy. Women who report smoking only in the first trimester and/or second trimesters, but not the third trimester, are considered to have quit smoking during pregnancy and women who smoked in the first trimester, but not the second trimester (among births with gestational age less than 27 weeks) are also considered to have quit smoking during pregnancy. If smoking status during the third trimester of pregnancy is unknown, quitting status is classified as "unknown". Also, among women who give birth at gestational age less than 27 weeks, if smoking status for the second trimester is "unknown", quitting status is classified as "unknown".

History

Comparable HP2020 objective
Modified, which includes core objectives that are continuing from Healthy People 2020 but underwent a change in measurement.
Changes between HP2020 and HP2030
This objective differs from Healthy People 2020 objective TU-6 in that the data source for objective TU-6 was the National Health Interview Survey (NHIS), while the data source for this objective is the National Vital Statistics System- Natality (NVSS-N).
Revision History
Revised. 

In 2022, SAS programs were corrected to exclude persons with unknown gestational age, and as a result some estimates and standard errors may be different from what was previously displayed.
The baseline, baseline year and target were all not affected.


1. Effect size h=0.1 was chosen to correspond with 10% improvement from a baseline of 50%.