3 ms·
A take from one of my favorite medical bloggers: >Where to begin? I didn’t see any sample size calculation, nor any discussion of what they expected to see. On
by tedsanders 10y ago
A take from one of my favorite medical bloggers:
>Where to begin? I didn’t see any sample size calculation, nor any discussion of what they expected to see. One of the reviewers did a power calculation for them (page 37) and found that based on 90 rats per group, the power was about 14%. This means that false positives are very likely. The cancer difference was only seen in females, not males. The incidence of brain cancer in the exposed groups was well within the historical range. There’s no clear dose response. Why schwannomas? Schwannomas in other locations than the heart were not significantly different. These are rats. I don’t know how this compares to real world exposure. And one more thing – the survival of male rats in the control group was relatively low, and if these tumors developed later in life, this could be the whole reason for the difference.
>Cell phones are UBIQUITOUS in the United States. If they were causing cancer, we would expect to see rates of [brain] cancer going up, right? That’s not what we’re seeing. They’ve been decreasing since the late 1980’s. At least when we talk about vaccines and autism, the rates of the latter went up as we increased the former. With cell phones, there’s an inverse relationship. What’s going on?
I suggest reading the whole post.
Personally, I am unconcerned by this single study of rats, in groups of only 90, that found barely significant correlations out of many possible correlations looked for.
http://theincidentaleconomist.com/wordpress/none-of-you-can-troll-me-like-austin-can-also-cell-phones-and-cancer-again/ http://theincidentaleconomist.com/wordpress/none-of-you-can-...