Compared to their white counterparts within each alcohol drinking pattern (never, moderate, excessive) investigated, black men and women were significantly more likely to get less than 6 hours of sleep, less likely to get 7 to 8 hours of sleep and generally more likely to get 9 or more hours of sleep.

Short sleep disparity increased with increasing alcohol consumption between black and white men. Long sleep duration was more common among heavy drinkers, but only in black men and white women.