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A new study out, i found this really interesting. common blood pressure drug may be tied to a lower risk of alzheimer's. >> this a very interesting finding. observational study and we need more and more research. the study coming from john hopkins. what they found was over 2000 patients who used to take the drug, we made a big deal out of this. really helpful for alzheimer, but the blood pressure medication, now they have 50% lower chance of getting alzheimer. which is big news. the question is if it is medication directly lowering the risk of alzheimer's or lowering the blood pressure that ca...

Chance of surviving than those who don't. dr. david is the chair of urology at lenox hill hospital. we know he's a master surgeon, the best in the world we're told. on this particular issue, you want women to know what about multivitamins? >> so this particular study that's coming from einstein, they're looking at over 160,000 women, so it's a big size of patients. who had invasive breast cancer. we're not talking about healthy women. they already had invasive breast cancers. they were taking multivitamins. they had 30% less chance of dying. it's an observational study. what i want people to k...

A new study has a lot of people talking tonight. the study found a link between autism and induced labor. in other words, babies born to moms who receive medications to expedite labor. it's the kind of finding that can sound alarming, but it comes with a lot of caveats. dr. sanjay gupta joins me tonight. >> sanjay, what can you tell us about this? >> first of all, i want to make clear at the top, this is an observational study. no one is saying it's a cause and effect here. it's concerning to a lot of people. it's going to capture a lot of headlines. no one can say inducing labor leads to auti...

Observational study. no one is saying it's a cause and effect here. it's concerning to a lot of people. it's going to capture a lot of headlines. no one can say inducing labor leads to autism, this study was an observational study, looking at boys and they found that there was an association between inducing labor, augmenting labor and having a boy that's subsequently at higher risk of autism. inducing labor means a woman is around her due date she has not yet developed contractions, you give medicines to start those contractions. take a look at the numbers there, if someone induces, it's abou...

>> first of all, i want to make clear at the top, this is an observational study. no one is saying it's a cause and effect here. it's concerning to a lot of people. it's going to capture a lot of headlines. no one can say inducing labor leads to autism, this study was an observational study, looking at boys and they found that there was an association between inducing labor, augmenting labor and having a boy that's subsequently at higher risk of autism. let me show you some numbers really quick. first of all, inducing labor means a woman is around her due date she has not yet developed contrac...