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I didn't. There is no context there. It's not the whole group that were not reduced. Read the sentence again:

> food allergy was lower in the group introduced to allergenic foods early but the difference was not statistically significant

Group introduced to allergenic foods early. And of course if you control for kids that don't already display an allergy at the age that they're introducing it, you're going to have a reduced rate of allergy.

There's a reason they're saying it's not statistically significant...



It was statistically insignificant among the whole early introduction group. This includes everyone who may have been randomised into that group but then didn't follow the (quite onerous) regimen that we were given. This was a full schedule of when different foods had to be fed to the baby and how much. We'd have to record whether they had eaten the amount required and so on. Among those who did follow it, the results were significant. Most importantly, there were zero cases of peanut allergy in that group.

More details are in the paper itself: https://www.nejm.org/doi/full/10.1056/NEJMoa1514210




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