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Evaluation of the London Measure of Unplanned Pregnancy in a United States Population of Women

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  • Diane Morof
  • Jody Steinauer
  • Sadia Haider
  • Sonia Liu
  • Philip Darney
  • Geraldine Barrett

Abstract

Objective: To evaluate the reliability and validity of the London Measure of Unplanned Pregnancy (a U.K.-developed measure of pregnancy intention), in English and Spanish translation, in a U.S. population of women. Methods: A psychometric evaluation study of the London Measure of Unplanned Pregnancy (LMUP), a six-item, self-completion paper measure was conducted with 346 women aged 15–45 who presented to San Francisco General Hospital for termination of pregnancy or antenatal care. Analyses of the two language versions were carried out separately. Reliability (internal consistency) was assessed using Cronbach's alpha and item-total correlations. Test-retest reliability (stability) was assessed using weighted Kappa. Construct validity was assessed using principal components analysis and hypothesis testing. Results: Psychometric testing demonstrated that the LMUP was reliable and valid in both U.S. English (alpha = 0.78, all item-total correlations >0.20, weighted Kappa = 0.72, unidimensionality confirmed, hypotheses met) and Spanish translation (alpha = 0.84, all item-total correlations >0.20, weighted Kappa = 0.77, unidimensionality confirmed, hypotheses met). Conclusion: The LMUP was reliable and valid in U.S. English and Spanish translation and therefore may now be used with U.S. women.

Suggested Citation

  • Diane Morof & Jody Steinauer & Sadia Haider & Sonia Liu & Philip Darney & Geraldine Barrett, 2012. "Evaluation of the London Measure of Unplanned Pregnancy in a United States Population of Women," PLOS ONE, Public Library of Science, vol. 7(4), pages 1-7, April.
    • Handle: RePEc:plo:pone00:0035381
    DOI: 10.1371/journal.pone.0035381
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    References listed on IDEAS

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    1. Ted Joyce & Robert Kaestner & Sanders Korenman, 2002. "On the validity of retrospective assessments of pregnancy intention," Demography, Springer;Population Association of America (PAA), vol. 39(1), pages 199-213, February.
    2. Corinne Rocca & Suneeta Krishnan & Geraldine Barrett & Mark Wilson, 2010. "Measuring pregnancy planning," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 23(11), pages 293-334.
    3. Santelli, J.S. & Speizer, I.S. & Avery, A. & Kendall, C., 2006. "An exploration of the dimensions of pregnancy intentions among women choosing to terminate pregnancy or to initiate prenatal care in New Orleans, Louisiana," American Journal of Public Health, American Public Health Association, vol. 96(11), pages 2009-2015.
    4. Barrett, Geraldine & Wellings, Kaye, 2002. "What is a 'planned' pregnancy? empirical data from a British study," Social Science & Medicine, Elsevier, vol. 55(4), pages 545-557, August.
    5. Lee Cronbach, 1951. "Coefficient alpha and the internal structure of tests," Psychometrika, Springer;The Psychometric Society, vol. 16(3), pages 297-334, September.
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    Cited by:

    1. Joline Goossens & Sofie Verhaeghe & Ann Van Hecke & Geraldine Barrett & Ilse Delbaere & Dimitri Beeckman, 2018. "Psychometric properties of the Dutch version of the London Measure of Unplanned Pregnancy in women with pregnancies ending in birth," PLOS ONE, Public Library of Science, vol. 13(4), pages 1-15, April.
    2. Meredith G Manze & Diana R Romero & Prabal De & Josette Hartnett & Lynn Roberts, 2021. "The association of pregnancy control, emotions, and beliefs with pregnancy desires: A new perspective on pregnancy intentions," PLOS ONE, Public Library of Science, vol. 16(3), pages 1-15, March.
    3. Adina Y Lang & Jennifer A Hall & Jacqueline A Boyle & Cheryce L Harrison & Helena Teede & Lisa J Moran & Geraldine Barrett, 2019. "Validation of the London Measure of Unplanned Pregnancy among pregnant Australian women," PLOS ONE, Public Library of Science, vol. 14(8), pages 1-14, August.

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