ArticleBMJ open2019
Association of tea drinking and dysmenorrhoea among reproductive-age women in Shanghai, China (2013-2015): a cross-sectional study.
Article in BMJ open, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
10 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.
- Burden, impacts and management practices of dysmenorrhea among female students in Ethiopia: a systematic review and meta-analysis.International health · 2025Pooled it
- Beverage consumption patterns and primary dysmenorrhea among women of reproductive age: a population-based study in Beijing, China.Frontiers in nutrition · 2026Article
- Associations between soft drinks intake and primary dysmenorrhea among Chinese undergraduate female students.Scientific reports · 2024Article
- Common Beverage Consumption and Benign Gynecological Conditions.Beverages (Basel, Switzerland) · 2024Article
- Primary dysmenorrhea and its associated factors among female high school students in Nekemte town, East Wallaga Zone, Western Oromia, Ethiopia: a cross-sectional study.Frontiers in reproductive health · 2024Article
- Review
- Insight into Dysmenorrhea Research from 1992 to 2022: A Bibliometric Analysis.Journal of pain research · 2023Review
- Beneficial Effects of Green Tea Catechins on Female Reproductive Disorders: A Review.Molecules (Basel, Switzerland) · 2021Review
- Factors Related to Primary Dysmenorrhea in Turkish Women: a Multiple Multinomial Logistic Regression Analysis.Reproductive sciences (Thousand Oaks, Calif.) · 2021Article
- Thyme Tea and Primary Dysmenorrhea Among Young Female Students.Adolescent health, medicine and therapeutics · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesTo investigate the association between tea drinking and dysmenorrhoea among women of reproductive age.
designA cross-sectional study based on Shanghai Birth Cohort Study.
settingTwo preconceptional care clinics in Shanghai, China.
participants1183 women of reproductive age who sought preconceptional care were recruited from August 2013 to April 2015. PRIMARY AND SECONDARY OUTCOME MEASURES: Participants were asked if they had pelvic pain associated with menstrual bleeding during the past 12 months and to further grade the intensity of menstrual cramp as mild, moderate and severe. Multinomial logistic regression was performed to assess the association of tea drinking and dysmenorrhoea. Other information, such as demographic and lifestyle factors, was also collected and assessed in relation to dysmenorrhoea.
resultsThe prevalence of dysmenorrhoea was 57.8%, among whom 10.4% and 3.5% had moderate and severe dysmenorrhoea, respectively. Tea drinking was associated with a lower prevalence of dysmenorrhoea (adjusted OR [aOR]=0.68, 95% CI 0.50 to 0.93 for mild dysmenorrhoea; aOR=0.59 (95% CI 0.32 to 1.04) for moderate-to-severe dysmenorrhoea). Green tea and oolong tea appeared to have most reduction in the prevalence of dysmenorrhoea (for mild dysmenorrhoea: green tea: aOR=0.63 (95% CI 0.44 to 0.90) and oolong tea: aOR=0.60 (95% CI 0.35 to 1.03); for moderate-to-severe dysmenorrhoea: green tea: aOR=0.42 (95% CI 0.20 to 0.85) and oolong tea: aOR=0.34 (95% CI 0.11 to 1.09)).
conclusionsConsumptions of green tea and possibly oolong tea were associated with a lower prevalence of dysmenorrhoea.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.