In a new study, published Monday in JAMA Internal Medicine, researchers tracked sleep quality for 120,000 people for up to two years.

The results showed sleep durations and patterns are highly variable between people.

Despite that, the study found people with BMIs of 30 or above — which is considered obese by the US Centers for Disease Control and Prevention — had slightly shorter mean sleep durations and more variable sleep patterns.

Get the full story at cnn.com.