TY - T1 - Normative values for sleep parameters in pre-schoolers using actigraphy SN - / UR - http://hdl.handle.net/10138/311503 T3 - A1 - Sahlberg, Lassi; Lapinleimu, Helena; Elovainio, Marko; Rönnlund, Hanni; Virtanen, Irina A2 - PB - Y1 - 2018 LA - eng AB - Objective: There are currently no reference values for actigraphy-measured sleep length and fragmentation in preschool children. We created standardized parameters using a community sample. Methods: Ninety-seven 2-to-6-year-old children (56 boys) wore an actigraph on their non-dominant wrist for seven days. The data was extracted and scored, calculating total sleep time, sleep latency, sleep efficiency, fragmentation index, circadian rhythm length, cosine peak and light/dark ratio. Subjects were... VO - IS - SP - OP - KW - Children; Sleep; Reference values; Actigraphy; Age; SCHOOL-AGED CHILDREN; POLYSOMNOGRAPHY; ADOLESCENTS; ACCELEROMETER; CONCORDANCE; PATTERNS; RULES; LOGS; 515 Psychology N1 - PP - ER -