As the demand for sleep evaluations rises, one response has been to co
nduct such studies in the home. In this brief review, complex home sle
ep monitoring systems (those recording at least four channels of physi
ologic data) on which there is peer-reviewed data are assessed. Four c
urrently available systems met these criteria and are discussed. Each
such system has clear strengths and weaknesses. These overall data sug
gest that home monitoring systems are becoming increasingly complex an
d more successful in monitoring the desired variables. This trend is l
ikely to continue.