Survivor bias ;)
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How is this survivor bias? Obviously the authors did not condition on survivorship, as fatalities were a main outcome of the study...
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But do I value good chance of gaining six months at end of life more than small risk of losing 40 at start?
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Statistically speaking you might add.
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Happy to see the long term benefit. Just recovering from hit by a car that didn't look. My lesson: anticipate car drivers are blind.
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I'm a biker and would love to believe this but... OBSERVATIONAL STUDY (sigh)
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Alternate headline: 'Healthier people more likely to bike to work'
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But only the traffic risks are causally linked.
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The hazard ratio was not affected by walking or mixed-walking cycling. Only cycling alone. I suspect poor controls for selection bias.
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