Originally Posted by
njkayaker
Where is the other report?
The footnote says, "24 Thompson DC, Nunn ME, Thompson RS, Rivara FP. Effectiveness of bicycle-safety helmets in preventing serious facial injury. JAMA 1996; 276: 1974-5."
Originally Posted by
njkayaker
That study is from 1997 from the same authors. Skye's reference is to a new study (with almost the same number of people).
Same title, same authors, different year? I didn't catch that - but abstract is also exactly the same, which I did check. Is it really a different study? Or perhaps the same study, re-published.
Checking into this, there's a link on that same site,
http://www.ncbi.nlm.nih.gov/pubmed/9213156 which has the 1997 date. It looks the same. I think it's the same study, which means that none of this is very current.
Originally Posted by
njkayaker
...
It's possible that the "10% difference" is 94% sure to be real (we'd have to read the article to know).
Yes, that's what I was trying to get across when I wrote "
but they're saying that the number of examples is too small for 10% improvement to be a hard and fast conclusion."