"the likelihood of short sleep increased with greater poverty"
Poor people are much more likely to work irregular shifts and night shifts, which have a serious impact on sleep.
Lower income and educational attainment was associated with more sleep complaints. Employment was associated with less sleep complaints and unemployment with more.
Rates of sleep complaints in African-American, Hispanic/Latino and Asian/Other groups were similar to Whites. Lower socioeconomic status was associated with higher rates of sleep complaint.