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Actigraphy Assessment of Mothers’ Sleep at 6, 12 & 18 weeks postpartum. Janelle MacKenzie , Kerry Armstrong & Simon Smith. email: [email protected]. Sleep metrics explained. Total Sleep Time = sb 1 + sb 2 + sb 3 Sleep Efficiency = ( sb 1 + sb 2 + sb 3 ) / TIB - PowerPoint PPT Presentation
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Actigraphy Assessment of Mothers’ Sleep
at 6, 12 & 18 weeks postpartum
Janelle MacKenzie,Kerry Armstrong & Simon Smith
email: [email protected]
Sleep metrics explained
• Total Sleep Time = sb1 + sb2 + sb3 • Sleep Efficiency = (sb1 + sb2 + sb3) / TIB• Sleep Quality = mean(sq1 + sq2 + sq3)
TIB
22:00 06:00
sb1 sb3sb2
sq2 sq1 sq3
Total sleep time and No. of sleep bouts
Week 6 Week 12 Week 18300330360390420450480 TST
Min
utes
Mean 3.12 2.81 2.61SD (0.62) (0.68) (0.64)
No. of sleep bouts per night
Example:
Sleep efficiency and Sleep quality
Week 6 Week 12 Week 1850
60
70
80
90
100
SESQ
Assessment Week
Perc
enta
ge (
%)
+1 SD
