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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: Sleep Med. 2017 Jun 30;37:124–129. doi: 10.1016/j.sleep.2017.06.012

Table 3.

Comparison of Sleep Parameters Assessed by PSG and Actigraphy (x̄ ± SD): 10 Immobile or Mobile Minutes Required for Sleep Onset or End (n = 50)

Parameters PSG Actigraphy Difference P value
TST (min) 267.5 ± 71.4
0 176.8 ± 82.8 −90.7 < 0.001
5 257.3 ± 75.2 −10.2 0.247
10 278.4 ± 72.4 10.9 0.208
20 299.0 ± 69.6 31.5 < 0.001
40 317.4 ± 65.6 49.9 < 0.001
SE (%) 65.6 ± 16.9
0 43.3 ± 20.0 −22.3 < 0.001
5 63.0 ± 17.9 −2.6 0.235
10 68.2 ± 17.0 2.6 0.215
20 73.3 ± 15.9 7.7 < 0.001
40 77.7 ± 14.7 12.1 < 0.001
WASO (min) 96.6 ± 59.2
0 188.0 ± 64.9 91.4 < 0.001
5 107.5 ± 48.6 10.9 0.152
10 86.4 ± 43.0 −10.2 0.160
20 65.7 ± 35.5 −30.9 < 0.001
40 47.4 ± 29.3 −49.2 < 0.001

Values in italic: various actigraphy thresholds. Values in bold are closest to PSG values. TST: total sleep time; SE: sleep efficiency; WASO: wake after sleep onset.