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Children without Brothers or Sisters Have 50% Higher Risk of Obesity

Scientists have pinpointed a potential risk factor for overweight and obesity early in life and it has to do with how many siblings a child has….

Researchers at the University of Gothenburg in Sweden, in addition to researchers from other institutions across Europe, found that only children are more than 50 percent more likely to be overweight or obese, compared with children with brothers and/or sisters.

The study, included 12,700 children ages 2 to 9 throughout Europe, who participated in the EFfects In Children and infantS (IDEFICS) study. The researchers had the parents of the children fill out questionnaires about the children’s diets, exercise and play time.

The researchers found an association between being an only child, and overweight and obesity after taking into account known risk factors like parental weight, weight at birth and gender. The researchers also found that only children were more likely to come from households with less education, less likely to play outside, and more likely to have TVs in the bedroom, though researchers that said even after taking these factors into consideration, the findings still held true.

"The excess risk of overweight among children without siblings was robustly observed even when considering behavioral mediating factors (playtime, screen time per day, dietary propensities for sugar or fat, parental attitudes towards food rewards and television in the child’s bedroom)," the researchers wrote in the study.

It is important to note, though, that the study was conducted only in children from Europe.

The study, published in the journal Nutrition and Diabetes, included 12,700 children ages 2 to 9 throughout Europe, who participated in the EFfects In Children and infantS (IDEFICS) study.