Vos, H.

study actigraphic diary duration actigraphy disagreement measure di fferences quality fference actigraphic tst night person participant depressive symptoms function assessment estimate research patient actigraphically method health polysomnography estimation bed time level research society insomnia objective depressive rotterdam disability parameter symptom rotterdam study perception e fficiency <0.001 population score actigraphic measures diary tst health assessment questionnaire van den berg ó 2008 european studies depression scale result diary estimates assessment methods gender study population questionnaire determinant medication fficiency center direction quality index analyses onset latency regression analyses scale parkinson õs disease fferent di fferences i.e european netherland correlation coe fficient table ces-d agreement depression society measurement correlation disease discrepancy 295–302 period