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A U-Shaped Relationship between Body Mass Index and Dysmenorrhea: A Longitudinal Study.

Abstract

BACKGROUND

Both obesity and dysmenorrhea are prevalent among women. Few population-based longitudinal studies investigate the association between body mass index (BMI) and dysmenorrhea yielding mixed results, especially for obesity. This study aims to investigate the long-term association between BMI and dysmenorrhea.

METHODS

9,688 women from a prospective population-based cohort study were followed for 13 years. Data were collected through self-reported questionnaires. The longitudinal association between dysmenorrhea and BMI or BMI change was investigated by logistic regression analysis using generalized estimating equations to account for the repeated measures.

RESULTS

When the women were aged 22 to 27 years, approximately 11% were obese, 7% underweight, and 25% reported dysmenorrhea. Compared to women with a normal weight, significantly higher odds of reporting dysmenorrhea were detected for both women who were underweight (odds ratio (OR) 1.34, 95% confidence interval (CI) 1.15, 1.57) and obese (OR 1.22, 95% CI 1.11, 1.35). Compared to women who remained at normal weight or overweight over time, significant risk was detected for women who: remained underweight or obese (OR 1.33, 95% CI 1.20, 1.48), were underweight despite weight gain (OR 1.33, 95% CI 1.12, 1.58), became underweight (OR 1.28, 95% CI 1.02, 1.61). However the higher risk among obese women disappeared when they lost weight (OR 1.06, 95% CI 0.85, 1.32).

CONCLUSIONS

A U-shaped association was revealed between dysmenorrhea and BMI, revealing a higher risk of dysmenorrhea for both underweight and obese women. Maintaining a healthy weight over time may be important for women to have pain-free periods.

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  • Authors+Show Affiliations

    ,

    Centre for Longitudinal and Life Course Research, School of Public Health, the University of Queensland, Brisbane, Queensland, Australia.

    ,

    Centre for Longitudinal and Life Course Research, School of Public Health, the University of Queensland, Brisbane, Queensland, Australia.

    Centre for Longitudinal and Life Course Research, School of Public Health, the University of Queensland, Brisbane, Queensland, Australia.

    Source

    PloS one 10:7 2015 pg e0134187

    MeSH

    Adolescent
    Adult
    Australia
    Body Mass Index
    Dysmenorrhea
    Female
    Follow-Up Studies
    Humans
    Longitudinal Studies
    Obesity
    Odds Ratio
    Prevalence
    Prospective Studies
    Risk Factors
    Young Adult

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    26218569

    Citation

    Ju, Hong, et al. "A U-Shaped Relationship Between Body Mass Index and Dysmenorrhea: a Longitudinal Study." PloS One, vol. 10, no. 7, 2015, pp. e0134187.
    Ju H, Jones M, Mishra GD. A U-Shaped Relationship between Body Mass Index and Dysmenorrhea: A Longitudinal Study. PLoS ONE. 2015;10(7):e0134187.
    Ju, H., Jones, M., & Mishra, G. D. (2015). A U-Shaped Relationship between Body Mass Index and Dysmenorrhea: A Longitudinal Study. PloS One, 10(7), pp. e0134187. doi:10.1371/journal.pone.0134187.
    Ju H, Jones M, Mishra GD. A U-Shaped Relationship Between Body Mass Index and Dysmenorrhea: a Longitudinal Study. PLoS ONE. 2015;10(7):e0134187. PubMed PMID: 26218569.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - A U-Shaped Relationship between Body Mass Index and Dysmenorrhea: A Longitudinal Study. AU - Ju,Hong, AU - Jones,Mark, AU - Mishra,Gita D, Y1 - 2015/07/28/ PY - 2015/04/08/received PY - 2015/07/06/accepted PY - 2015/7/29/entrez PY - 2015/7/29/pubmed PY - 2016/5/11/medline SP - e0134187 EP - e0134187 JF - PloS one JO - PLoS ONE VL - 10 IS - 7 N2 - BACKGROUND: Both obesity and dysmenorrhea are prevalent among women. Few population-based longitudinal studies investigate the association between body mass index (BMI) and dysmenorrhea yielding mixed results, especially for obesity. This study aims to investigate the long-term association between BMI and dysmenorrhea. METHODS: 9,688 women from a prospective population-based cohort study were followed for 13 years. Data were collected through self-reported questionnaires. The longitudinal association between dysmenorrhea and BMI or BMI change was investigated by logistic regression analysis using generalized estimating equations to account for the repeated measures. RESULTS: When the women were aged 22 to 27 years, approximately 11% were obese, 7% underweight, and 25% reported dysmenorrhea. Compared to women with a normal weight, significantly higher odds of reporting dysmenorrhea were detected for both women who were underweight (odds ratio (OR) 1.34, 95% confidence interval (CI) 1.15, 1.57) and obese (OR 1.22, 95% CI 1.11, 1.35). Compared to women who remained at normal weight or overweight over time, significant risk was detected for women who: remained underweight or obese (OR 1.33, 95% CI 1.20, 1.48), were underweight despite weight gain (OR 1.33, 95% CI 1.12, 1.58), became underweight (OR 1.28, 95% CI 1.02, 1.61). However the higher risk among obese women disappeared when they lost weight (OR 1.06, 95% CI 0.85, 1.32). CONCLUSIONS: A U-shaped association was revealed between dysmenorrhea and BMI, revealing a higher risk of dysmenorrhea for both underweight and obese women. Maintaining a healthy weight over time may be important for women to have pain-free periods. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/26218569/full_citation L2 - http://dx.plos.org/10.1371/journal.pone.0134187 DB - PRIME DP - Unbound Medicine ER -