Of the study group 25 percent went to bed at 8 p.m. or earlier, 50 percent from after 8 p.m. but before 9 p.m. and 25 percent after 9 p.m. The obesity rate by age 15 of the children put to bed earliest was 10 percent. It was 16 percent among those put to bed after 8 p.m. but before 9 p.m. and 23 percent among those that went to bed after 9 p.m. The study states, "Preschool-aged children with early weekday bedtimes were one-half as likely as children with late bedtimes to be obese as adolescents. Bedtimes are a modifiable routine that may help to prevent obesity."
reports for The Columbus Dispatch. "The research was based on data from something called the Study of Early Child Care and Youth Development, which was started 25 years ago and funded by the National Institutes of Health," said lead researcher Sarah Friedman, who said the idea was conceived during a meeting of researchers from the National Academy of Sciences.