Where a teenage girl sees herself on her school's social ladder may sway her future weight, a study of more than 4,000 girls finds. Those who believed they were unpopular gained more weight over a two-year period than girls who viewed themselves as more popular. Researchers said the study showed how a girl's view of her social status has broader health consequences.

The girls in the study were still growing — their average age was 15 — and all of them gained some weight. However, those who rated themselves low in popularity were 69 percent more likely than other girls to increase their body mass index by two units, the equivalent of gaining about 11 excess pounds. (The body mass index, or BMI, is a calculation based on height and weight.)

Girls who put themselves on the higher rungs of popularity also gained some excess weight, but less — about 6 1/2 pounds.

Autism cases in California continued to climb even after a mercury-based vaccine preservative that some people blame for the neurological disorder was removed from routine childhood shots, a new study found.

Researchers from the state Department of Public Health found the autism rate in children rose continuously during the 12-year study period from 1995 to 2007. The preservative thimerosal hasn't been used in childhood vaccines since 2001, but is used in some flu shots.

Doctors say the latest study adds to existing evidence refuting a link between thimerosal exposure and autism risk and should reassure parents that the disorder is not caused by vaccinations. If there was a risk, they said, autism rates should have dropped between 2004 and 2007.

The findings show "no evidence of mercury poisoning in autism" since there was no decline in autism rates even after the elimination of thimerosal, said Dr. Eric Fombonne, an autism researcher at Montreal Children's Hospital who had no role in the research.

The drugs most widely used to manage aggressive outbursts in intellectually disabled people are no more effective than placebos for most patients and may be less so, researchers report.

The finding, being published Friday, sharply challenges standard medical practice in mental health clinics and nursing homes in the United States and around the world.

In recent years, many doctors have begun to use the so-called antipsychotic drugs, which were developed to treat schizophrenia, as all-purpose tranquilizers to settle threatening behavior — in children with attention-deficit problems, college students with depression, older people with Alzheimer’s disease and intellectually handicapped people.

After the holidays, many shoppers load up their carts with storage bins, shelving systems and color-coded containers, all in a resolute quest to get organized for the new year.

The country’s collective desire to clean up is evident in the proliferation of organization-oriented businesses like the Container Store and California Closets. Reality shows like “Mission Organization” on HGTV and “How Clean is Your House?” on Lifetime feed a national obsession to declutter. The magazine Real Simple has even created a $13 special issue on cleaning house.

Getting organized is unquestionably good for both mind and body — reducing risks for falls, helping eliminate germs and making it easier to find things like medicine and exercise gear.