Refining assessment of contraceptive use in the past year in relation to risk of unintended pregnancy

Healthy People 2020 establishes objectives for reducing the proportion of pregnancies in the United States that are unintended and for improving contraceptive use. This analysis describes ways to more closely align measurement of contraceptive use with periods of risk for unintended pregnancy using the National Survey of Family Growth (NSFG).Using the 2011-2015 NSFG we constructed two measures of contraceptive use for women we defined as at risk...