输入体重后会多出一行——而且根据用户的不同，这一行显示的内容也不同。男性会得到他的 FFMI：即相对于身高的瘦体重。女性则会得到对照 WHO 阈值的腰臀比，因为一项 2024 年针对 70.9 万人的元分析发现，该比例与心脏病发作风险的关联在女性中比在男性中更强。这不是同一个页面的两个版本，而是两个值得探讨的问题。#facts
Add your weight and one more row opens — and it is a different row depending on who is asking. A man gets his FFMI: how much lean mass he carries for his height. A woman gets waist-to-hip against the WHO's thresholds, because a 2024 meta-analysis over 709,000 people found that ratio's link to heart-attack risk is stronger in women than in men. Not two versions of the same screen. Two questions worth asking. #facts
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