Figure 2. Overall Annual Estimated Prevalence of Long Sleep Duration by Race and Ethnicity Among US Adults.

Long sleep duration was defined as self-reported sleep duration of more than 9 hours in a 24-hour period (data source: National Health Interview Survey, 2004-2018). Annual prevalence estimates were obtained using multinomial logistic regression adjusted by age and US region (details are found in the Methods section and eMethods in the Supplement). Error bars represent 95% CIs.