ON reading the abstract, one thing stood out was that the study was a quasi-experimental design. The authors employed fixed effects models and a natural experimental approach. Yet they did not go into enough details to determine whether that statistical model was appropriate (I suspect it was not). They also did not say how the so called natural experiment was set up. Nor did they mention sponsorship of the study. Until I can read the finer details of the study I am not sure of the results.
On Thu, Jan 26, 2012 at 9:01 AM, Cameron Childress <camer...@gmail.com> wrote: > > Ads a followup to last weeks' thread about this... Looks like preference > for sweets may be established so early that removing sweets from middle > schools has little to no effect. By then it's too late... > > http://www.nytimes.com/2012/01/24/health/research/study-finds-no-childhood-obesity-link-to-school-junk-food.html > > From the study's abstract: > "[...] they found that childrens weight gain between fifth and eighth > grades was not associated with the introduction or the duration of exposure > to competitive food sales in middle school. Also, the relationship between > competitive foods and weight gain did not vary significantly by gender, > race/ethnicity, or family socioeconomic status, and it remained weak and > insignificant across several alternative model specifications. One possible > explanation is that childrens food preferences and dietary patterns are > firmly established before adolescence." > > -Cameron > > ... > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-community/message.cfm/messageid:345820 Subscription: http://www.houseoffusion.com/groups/cf-community/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-community/unsubscribe.cfm
