Seven studies were included (n=483): three studies with a control group (n=325) and four uncontrolled studies (n=158). Treatment groups ranged in size from 16 to 115.
Two studies reported drop-out rates of 45% and 34%. All of the controlled studies used unblinded and non-equivalent control groups.
Four uncontrolled studies reported that MBSR was associated with a statistically significant improvement in measures of sleep quality or duration.
The three controlled studies reported no statistically significant difference in sleep measures between treatment and control groups.
Two of the three studies that assessed the relationship between the amount of home practice and sleep outcome measures reported a positive relationship.