Children who drink soda tend to score slightly higher on scales that measure aggressive behavior than those who don't drink the carbonated beverages, according to a new study.

The study's lead author cautioned, however, that the increase may not be noticeable for individual children and the researchers cannot prove soda caused the bad behavior.

"It's a little hard to interpret it. It's not quite clinically significant," Shakira Suglia, of Columbia University's Mailman School of Public Health in New York, says.