Even when written by doctors, Japanese diet books rarely cite high-quality scientific reviews, unlike American ones, which suggests that factors like language or training may limit access to scientific evidence in Japan.
Evidence from Studies
Supporting (1)
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The study found that American diet books often cite high-quality scientific reviews, but Japanese ones rarely do — even when written by doctors. This supports the idea that Japanese authors may have less access to or use of scientific evidence.
Contradicting (0)
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Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether language barriers, training curricula, or publication norms explain the persistent gap in systematic review citation between Japanese and American medical authors.
A systematic review and meta-analysis of all published studies comparing medical education curricula, access to English-language systematic reviews, and citation practices in diet books among physicians in Japan, the USA, and other non-English-speaking countries.
Whether Japanese medical students who receive training in English-language evidence retrieval are more likely to cite systematic reviews in future publications.
A 7-year prospective cohort study of 400 Japanese medical students, randomly assigned to receive or not receive training in accessing and interpreting English-language systematic reviews, then tracking citation patterns in their future diet and health publications.
Whether Japanese medical authors who cite systematic reviews are more likely to have read them in English or have formal training in evidence-based medicine.
A cross-sectional survey of 200 Japanese medical authors of diet books, assessing their English proficiency, exposure to systematic reviews, formal EBM training, and citation patterns in their books.
Whether individual Japanese medical authors changed their citation practices after accessing English-language systematic reviews.
A case series documenting 10 Japanese medical authors who began citing systematic reviews after accessing them through English-language databases or training, with detailed analysis of their prior citation habits.
Expert consensus on whether language access is the primary barrier to systematic review citation among Japanese medical authors.
A Delphi consensus process involving 20 Japanese and 20 international medical educators and publishers to rate the relative importance of language, training, and cultural norms in limiting systematic review citation by Japanese authors.