My daughter has a March birthday as does one of her friends (who also has Celiac). And her first winter was a rough winter, illness-wise. Seems like as good as a theory as any.
On reading the NIHS blurb I have to ask if the folks who did the study are nuts.
they split the calendar year into four quarters, and the percentage of celiacs found in each quarter was 27-25-25-23.
Let's see now, two of the quarters held exactly 1/4 of the celiac birthdays, and the other two quarters were all of TWO PERCENT HIGH OR LOW?
And that's somehow statistically significant, not just float, noise, or other sampling error?
I'd really love to hear some professional statisticians comment about that, because if I was getting numbers like that from a survey I would say at best that the season MIGHT have a VERY SMALL influence. Their conclusion that the season is of real significance? Based on a two percent difference? Aw, come on guys, that's an awfully slim percent.
"I believe that if life gives you lemons, you should make lemonade... And try to find somebody whose life has given them vodka, and have a party" - Ron White
""I like the cover," he said. "Don't Panic. It's the first helpful or intelligible thing anybody's said to me all day." ― Douglas Adams, The Hitchhiker's Guide to the Galaxy
DS2(age 8): celiac disease(positive IgA tTG, no biopsy- 11/2010)
DS1(age 12): repeated negative bloodwork and negative EGD/biopsy. Started on a gluten free trial(8/2011). He has decided to stay gluten free due to all of the improvements he has experienced on the diet.
One thing to keep in mind is that the percent of babies born each season is NOT constant-- April has the lowest number of births in the US, while September has the most.
If the time of year with the fewest births has the greatest number of celiac births, well, that's interesting...