Contraceptive failure rates in France

Results from a population-based survey

Caroline Moreau, J. Trussell, G. Rodriguez, N. Bajos, J. Bouyer

Research output: Contribution to journalArticle

Abstract

Background: Despite the widespread use of highly effective contraceptive methods in France, one in every three pregnancies is unintended, of which 65% occur while using contraceptives. In the USA, 49% of pregnancies are unintended, half of which result from contraceptive failure. This study provides estimates of method-specific failure rates among French women. Methods: We use data from the 2000 Cocon Study, a population-based cohort, comprising a representative sample of 1689 women aged 18-44 years who described their contraceptive history. Piecewise-constant hazards models were used to estimate method-specific contraceptive failure rates during the first 5 years of contraceptive use. A random effect was introduced to take into account the fact that some women contribute more than 1 contraceptive episode. These same models were used to assess the effects of socio-demographic characteristics on the probability of contraceptive failure among pill, intrauterine device (IUD) and condom users. Results: Overall, 2.9% of women experienced a contraceptive failure in the first year of use and 8.4% in the first 5 years of use. The IUD had the lowest first year failure rate (1.1%), followed by the pill (2.4%), the condom (3.6%), fertility awareness methods (periodic abstinence or safe period by temperature) (7.7%), withdrawal (10.1%) and spermicides (21.7%). These failure rates varied little by user characteristics. Conclusions: Lower failure rates among French women compared with those reported for US women suggest differences in contraceptive practices which need to be further explored.

Original languageEnglish (US)
Pages (from-to)2422-2427
Number of pages6
JournalHuman Reproduction
Volume22
Issue number9
DOIs
StatePublished - Sep 2007
Externally publishedYes

Fingerprint

Contraceptive Agents
France
Population
Intrauterine Devices
Condoms
Contraception
Natural Family Planning Methods
Pregnancy
Reproductive History
Surveys and Questionnaires
Proportional Hazards Models
Fertility
Demography
Temperature

Keywords

  • Contraceptive efficacy
  • Contraceptive failure
  • France
  • Population-based survey

ASJC Scopus subject areas

  • Physiology
  • Developmental Biology
  • Obstetrics and Gynecology
  • Reproductive Medicine

Cite this

Contraceptive failure rates in France : Results from a population-based survey. / Moreau, Caroline; Trussell, J.; Rodriguez, G.; Bajos, N.; Bouyer, J.

In: Human Reproduction, Vol. 22, No. 9, 09.2007, p. 2422-2427.

Research output: Contribution to journalArticle

Moreau, Caroline ; Trussell, J. ; Rodriguez, G. ; Bajos, N. ; Bouyer, J. / Contraceptive failure rates in France : Results from a population-based survey. In: Human Reproduction. 2007 ; Vol. 22, No. 9. pp. 2422-2427.
@article{f8291740efa647dca44d0d1c1fdeabe5,
title = "Contraceptive failure rates in France: Results from a population-based survey",
abstract = "Background: Despite the widespread use of highly effective contraceptive methods in France, one in every three pregnancies is unintended, of which 65{\%} occur while using contraceptives. In the USA, 49{\%} of pregnancies are unintended, half of which result from contraceptive failure. This study provides estimates of method-specific failure rates among French women. Methods: We use data from the 2000 Cocon Study, a population-based cohort, comprising a representative sample of 1689 women aged 18-44 years who described their contraceptive history. Piecewise-constant hazards models were used to estimate method-specific contraceptive failure rates during the first 5 years of contraceptive use. A random effect was introduced to take into account the fact that some women contribute more than 1 contraceptive episode. These same models were used to assess the effects of socio-demographic characteristics on the probability of contraceptive failure among pill, intrauterine device (IUD) and condom users. Results: Overall, 2.9{\%} of women experienced a contraceptive failure in the first year of use and 8.4{\%} in the first 5 years of use. The IUD had the lowest first year failure rate (1.1{\%}), followed by the pill (2.4{\%}), the condom (3.6{\%}), fertility awareness methods (periodic abstinence or safe period by temperature) (7.7{\%}), withdrawal (10.1{\%}) and spermicides (21.7{\%}). These failure rates varied little by user characteristics. Conclusions: Lower failure rates among French women compared with those reported for US women suggest differences in contraceptive practices which need to be further explored.",
keywords = "Contraceptive efficacy, Contraceptive failure, France, Population-based survey",
author = "Caroline Moreau and J. Trussell and G. Rodriguez and N. Bajos and J. Bouyer",
year = "2007",
month = "9",
doi = "10.1093/humrep/dem184",
language = "English (US)",
volume = "22",
pages = "2422--2427",
journal = "Human Reproduction",
issn = "0268-1161",
publisher = "Oxford University Press",
number = "9",

}

TY - JOUR

T1 - Contraceptive failure rates in France

T2 - Results from a population-based survey

AU - Moreau, Caroline

AU - Trussell, J.

AU - Rodriguez, G.

AU - Bajos, N.

AU - Bouyer, J.

PY - 2007/9

Y1 - 2007/9

N2 - Background: Despite the widespread use of highly effective contraceptive methods in France, one in every three pregnancies is unintended, of which 65% occur while using contraceptives. In the USA, 49% of pregnancies are unintended, half of which result from contraceptive failure. This study provides estimates of method-specific failure rates among French women. Methods: We use data from the 2000 Cocon Study, a population-based cohort, comprising a representative sample of 1689 women aged 18-44 years who described their contraceptive history. Piecewise-constant hazards models were used to estimate method-specific contraceptive failure rates during the first 5 years of contraceptive use. A random effect was introduced to take into account the fact that some women contribute more than 1 contraceptive episode. These same models were used to assess the effects of socio-demographic characteristics on the probability of contraceptive failure among pill, intrauterine device (IUD) and condom users. Results: Overall, 2.9% of women experienced a contraceptive failure in the first year of use and 8.4% in the first 5 years of use. The IUD had the lowest first year failure rate (1.1%), followed by the pill (2.4%), the condom (3.6%), fertility awareness methods (periodic abstinence or safe period by temperature) (7.7%), withdrawal (10.1%) and spermicides (21.7%). These failure rates varied little by user characteristics. Conclusions: Lower failure rates among French women compared with those reported for US women suggest differences in contraceptive practices which need to be further explored.

AB - Background: Despite the widespread use of highly effective contraceptive methods in France, one in every three pregnancies is unintended, of which 65% occur while using contraceptives. In the USA, 49% of pregnancies are unintended, half of which result from contraceptive failure. This study provides estimates of method-specific failure rates among French women. Methods: We use data from the 2000 Cocon Study, a population-based cohort, comprising a representative sample of 1689 women aged 18-44 years who described their contraceptive history. Piecewise-constant hazards models were used to estimate method-specific contraceptive failure rates during the first 5 years of contraceptive use. A random effect was introduced to take into account the fact that some women contribute more than 1 contraceptive episode. These same models were used to assess the effects of socio-demographic characteristics on the probability of contraceptive failure among pill, intrauterine device (IUD) and condom users. Results: Overall, 2.9% of women experienced a contraceptive failure in the first year of use and 8.4% in the first 5 years of use. The IUD had the lowest first year failure rate (1.1%), followed by the pill (2.4%), the condom (3.6%), fertility awareness methods (periodic abstinence or safe period by temperature) (7.7%), withdrawal (10.1%) and spermicides (21.7%). These failure rates varied little by user characteristics. Conclusions: Lower failure rates among French women compared with those reported for US women suggest differences in contraceptive practices which need to be further explored.

KW - Contraceptive efficacy

KW - Contraceptive failure

KW - France

KW - Population-based survey

UR - http://www.scopus.com/inward/record.url?scp=34548066224&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548066224&partnerID=8YFLogxK

U2 - 10.1093/humrep/dem184

DO - 10.1093/humrep/dem184

M3 - Article

VL - 22

SP - 2422

EP - 2427

JO - Human Reproduction

JF - Human Reproduction

SN - 0268-1161

IS - 9

ER -