Comment by Uncouple4063

> Sleep regularity was a stronger predictor of all-cause mortality than sleep duration, by comparing equivalent mortality models, and by comparing nested SRI-mortality models with and without sleep duration (p = 0.14–0.20). These findings indicate that sleep regularity is an important predictor of mortality risk and is a stronger predictor than sleep duration.

Not totally disagreeing with you, but this indicates that it is _more_ important than the latter two when concerned with all-cause mortality.