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Table 2 Average Night 1 and Night 2 objective sleep measures (n = 15)

From: Assessing the daily stability of the cortisol awakening response in a controlled environment

  Mean SD
TST (mins) 430.12 26.46
SOL (mins) 14.28 11.07
NWAK 13.87 4.89
WASO (mins) 13.12 6.59
SE (%) 94.02 2.77
Time in REM (%) 22.36 3.20
Time in N1 (%) 3.60 1.20
Time in N2 (%) 53.94 5.15
Time in N3 (%) 20.10 5.02
Latency to REM (mins) 105.87 33.79
Latency to N1 (mins) 14.28 11.07
Latency to N2 (mins) 20.73 12.59
Latency to N3 (mins) 33.73 13.77
  1. Abbreviations: N1: stage 1 sleep, N2: stage 2 sleep, N3: stage 3 sleep, NWAK: number of awakenings, REM: rapid eye movement sleep, SE: sleep efficiency, SOL: sleep onset latency, TST: total sleep time, WASO: wake after sleep onset