Despite the recommendation that adults get between seven and nine hours of sleep a night, a new study shows that about a third of us aren't hitting those goals.
Researchers from the Centers for Disease Control and Prevention looked at data from the 2010 National Health Interview Survey on sleep habits of U.S. workers. They found that 30 percent of people in the study -- which calculates to about 40.6 million workers in the U.S. -- get fewer than six hours of sleep a night. Their research was published in this week's Morbidity and Mortality Weekly Report.
The study of 15,214 people also shed light on what kinds of jobs are linked with less sleep. The researchers found that people who work in manufacturing get less sleep than other workers, with 34.1 percent of them reporting getting less than six hours of sleep a night.
In addition, people who work the night shift were more likely to report getting inadequate sleep (44 percent), compared with those working during the day (28.8 percent).
Among people who worked the night shift, certain industries had high prevalences of inadequate sleep, including 69.7 percent of warehouse and transportation workers and 52.3 percent of health-care and social assistance workers, according to the report.
The researchers also found that people between ages 30 and 64 were more likely to report not getting enough sleep, compared with workers between ages 18 and 29 and workers age 65 and older.
People who work more than one job are also more likely to not get enough sleep during the night, compared with people who just have one job -- 37 percent versus 29.4 percent. People who work more than 40 hours a week are also less likely to get enough sleep per night, compared with those who work a 40-or-under week.
Sleep deprivation is dangerous because it raises the risk of a whole host of health problems. Studies have linked inadequate rest with depression, a decreased immune system and memory issues, WebMD reported. Sleep deprivation has also been linked to obesity, high blood pressure and daytime fatigue, which could present safety issues on the job, Harvard Medical School reported.
Earlier this year, the Sleepy's mattress company released a study based on CDC data, ranking the most well-rested and the most sleep-deprived jobs. Click through the slideshow to see what made the list: