If you live in California, chances are you sleep better than the folks in the deep south, the U.S. region where residents report the most sleep disturbances and daytime fatigue according to a recent investigation. Researchers from the Perelman School of Medicine at the University of Pennsylvania analyzed data collected nationally by the U.S. Centers for Disease Control and Prevention to come up with the new “sleeplessness” map. In addition to California, the map shows that Alaska, North Dakota, Rhode Island and Minnesota are states where you’re most likely to get a good night’s sleep. The states with the most sleeping problems are Alabama, Mississippi, Arkansas and Oklahoma. Perhaps not coincidentally, these states also tend to report the highest rates of obesity. The researchers examined and considered factors such as age, sex, race/ethnicity, education, income employment, depression, overall physical health, smoking and alcohol intake in making their projections from rates of self-reported sleep problems from individuals in 36 states and territories. They also determined that the factors that best explain the regional disparities in sleep patterns are differences in mental health, race/ethnicity and access to medical care.