Listen: Morning people may have lower breast cancer risk
"A moment to new study suggests morning people might have a lower risk of breast cancer a._b._c.'s amy robot discussed the study with news a._b._c. news chief health and medical editor dr jennifer ashton tells a little bit about what this breast cancer in safe studying means for morning people and those who aren't well this was an incredibly interesting study amy because it first of all you hear say all the time we have to be careful when we hear data or new headlines that just are based on association this study actually looked for an observation and association and then tried to prove causality cause and effect so let me tell you what they did they looked at people's we call it krona type so i have never heard that term before really but it's whether you describe yourself as a morning person or an evening person it didn't cite hours with that then it identified how many went on to develop breast cancer and then it did genetic analysis on those people that's where they tried to prove cause and effect and what they showed was actually a protective effect amongst people who described themselves as morning people they had a lower risk of going on to develop breast cancer now here are my caveats with this when we hear a study like this or a headline we only hear one outcome as a doctor as a person we have to think holistically not just by body parts so while it might be protective against breast cancer to be a morning person maybe we'll find that it's bad against another outcome so again you have to take this with a little bit of a grain of confused if given left to my own devices i would be a night person for sure but i don't have heard that about you Waking up early. about this is interesting you say this isn't necessarily new yes leaping more than eight hours actually isn't good for you as we'll make that higher risk that was another finding is that if you slept more than about seven or eight hours on average night those people had an associated increase risk of developing breast cancer so when i say it's not new it's because we have known for a while especially in the world of sleep medicine that too much"