Trends and determinants of IUD use in the USA, 2002-2012

William Mosher, Caroline Moreau, Hannah Lantos

Research output: Contribution to journalArticle

Abstract

Study Question What factors and subgroups have propelled the recent increase in intrauterine device (IUD) use in the USA? Summary Answer The increase in IUD use, from 1.8 to 9.5% in the USA between 2002 and 2012, was driven primarily by a marked uptake among parous women who intended to have more children. What is Known Already Recent data suggest an unprecedented increase in IUD use among women in the USA, yet less is known about how this increase has affected the overall proportion of women, at risk of unintended pregnancy, who are using contraception and which social and economic groups are involved. Study Design, Size, Duration Data are drawn from the 2002 and 2011-2013 National Surveys of Family Growth. The surveys were based on cross-sectional, national samples of women of 15-44 years of age in the USA. Women responded to in-person interviews, which lasted an average of 80 min. The response rate was 80% in 2002 and 73% in 2011-2013. The sample included 7643 completed interviews in 2002 and 5601 interviews in 2011-2013. Participants/Materials, Setting, Methods This study was limited to women at risk of unintended pregnancy, i.e. women who were sexually active in the previous 3 months (using contraception or not); it excludes women who were sterile, currently pregnant or trying to conceive. Altogether, 5181 women were at risk in the 2002 sample and 3681 were at risk in the 2012 sample. We used descriptive statistics to investigate trends in contraceptive use patterns by women's sociodemographic characteristics between 2002 and 2012 and used logistic regression to identify current predictors of IUD use in 2012. Main Results and the Role of Chance IUD use increased from 1.8% in 2002 to 9.5% in 2012 (P <0.001). The surge was especially marked among parous women who intended to have more children (4.2% in 2002 to 19.3% in 2012; P <0.001); it occurred to a lesser extent among parous women who did not intend to have more children (2.0-9.7% P <0.001), suggesting that IUDs are more often used for spacing than for ending childbearing in the USA. The most important predictors of IUD use in 2012 were age, parity and intent to have children. Dissatisfaction with a previous method was also associated with IUD use (adjusted odds ratio = 1.89, P <0.001). LIMITATIONS, REASONS FOR CAUTION As with all cross-sectional studies, causal inference is limited. Data are self-reported, but the survey had a high response rate and rigorous quality controls. WIDER IMPLICATION OF THE FINDINGS This study shows promising trends in the use of highly effective contraceptive methods in the USA, which may help to explain recently reported declines in unintended pregnancy in the USA. STUDY FUNDING/COMPETING INTERESTS Caroline Moreau was supported by the William Robertson endowment funds. The work of Hannah Lantos and William Mosher on this analysis was supported by the Department of Population Family and Reproductive Health, The Johns Hopkins Bloomberg School of Public Health. The authors declare that no conflict of interest exists.

Original languageEnglish (US)
Pages (from-to)1696-1702
Number of pages7
JournalHuman Reproduction
Volume31
Issue number8
DOIs
StatePublished - Aug 1 2016

Fingerprint

Intrauterine Devices
Contraception
Financial Management
Interviews
Pregnancy
Public Health Schools
Conflict of Interest
Family Health
Reproductive Health
Contraceptive Agents
Parity
Quality Control
Cross-Sectional Studies
Logistic Models
Odds Ratio
Economics

Keywords

  • Contraception
  • demographics
  • IUDs
  • LARCs
  • survey statistics (or surveys)
  • unmet need
  • USA

ASJC Scopus subject areas

  • Reproductive Medicine
  • Rehabilitation
  • Obstetrics and Gynecology

Cite this

Trends and determinants of IUD use in the USA, 2002-2012. / Mosher, William; Moreau, Caroline; Lantos, Hannah.

In: Human Reproduction, Vol. 31, No. 8, 01.08.2016, p. 1696-1702.

Research output: Contribution to journalArticle

Mosher, William ; Moreau, Caroline ; Lantos, Hannah. / Trends and determinants of IUD use in the USA, 2002-2012. In: Human Reproduction. 2016 ; Vol. 31, No. 8. pp. 1696-1702.
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abstract = "Study Question What factors and subgroups have propelled the recent increase in intrauterine device (IUD) use in the USA? Summary Answer The increase in IUD use, from 1.8 to 9.5{\%} in the USA between 2002 and 2012, was driven primarily by a marked uptake among parous women who intended to have more children. What is Known Already Recent data suggest an unprecedented increase in IUD use among women in the USA, yet less is known about how this increase has affected the overall proportion of women, at risk of unintended pregnancy, who are using contraception and which social and economic groups are involved. Study Design, Size, Duration Data are drawn from the 2002 and 2011-2013 National Surveys of Family Growth. The surveys were based on cross-sectional, national samples of women of 15-44 years of age in the USA. Women responded to in-person interviews, which lasted an average of 80 min. The response rate was 80{\%} in 2002 and 73{\%} in 2011-2013. The sample included 7643 completed interviews in 2002 and 5601 interviews in 2011-2013. Participants/Materials, Setting, Methods This study was limited to women at risk of unintended pregnancy, i.e. women who were sexually active in the previous 3 months (using contraception or not); it excludes women who were sterile, currently pregnant or trying to conceive. Altogether, 5181 women were at risk in the 2002 sample and 3681 were at risk in the 2012 sample. We used descriptive statistics to investigate trends in contraceptive use patterns by women's sociodemographic characteristics between 2002 and 2012 and used logistic regression to identify current predictors of IUD use in 2012. Main Results and the Role of Chance IUD use increased from 1.8{\%} in 2002 to 9.5{\%} in 2012 (P <0.001). The surge was especially marked among parous women who intended to have more children (4.2{\%} in 2002 to 19.3{\%} in 2012; P <0.001); it occurred to a lesser extent among parous women who did not intend to have more children (2.0-9.7{\%} P <0.001), suggesting that IUDs are more often used for spacing than for ending childbearing in the USA. The most important predictors of IUD use in 2012 were age, parity and intent to have children. Dissatisfaction with a previous method was also associated with IUD use (adjusted odds ratio = 1.89, P <0.001). LIMITATIONS, REASONS FOR CAUTION As with all cross-sectional studies, causal inference is limited. Data are self-reported, but the survey had a high response rate and rigorous quality controls. WIDER IMPLICATION OF THE FINDINGS This study shows promising trends in the use of highly effective contraceptive methods in the USA, which may help to explain recently reported declines in unintended pregnancy in the USA. STUDY FUNDING/COMPETING INTERESTS Caroline Moreau was supported by the William Robertson endowment funds. The work of Hannah Lantos and William Mosher on this analysis was supported by the Department of Population Family and Reproductive Health, The Johns Hopkins Bloomberg School of Public Health. The authors declare that no conflict of interest exists.",
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