Table 2 Electroencephalographic sleep data summaries

From: Decreased neuroautonomic complexity in men during an acute major depressive episode: analysis of heart rate dynamics

 

Healthy ( N =20)

Depressed ( N =25)

P -value

Sleep continuity

   

 Total sleep time (min)

487 (436–543)

375 (204–485)

<0.0001

 Sleep latency (min)

28 (7–40)

48 (19–186)

<0.0001

 Sleep efficiency (%)

85.6 (78.2–94.5)

66.9 (35.8–89.3)

<0.0001

 No. of awakenings

57 (27–90)

74 (29–115)

0.07

 Awake time (min)

58.5 (14–90)

98 (38–204)

<0.0001

 Awake time (% SPT)

10.4 (3.2–16.4)

22.1 (13.7 – 47.0)

<0.0001

NREM

   

 % Stage 1

7.9 (3.8–11)

10 (2.9–61)

0.004

 % Stage 2

58.3 (35.1–73.0)

58 (7.0–74.1)

n.s.

 % Delta

14.1 (7–25.9)

3.8 (0–17)

<0.0001

REM

   

 % REM

21.3 (14.5–27.4)

20.5 (9.5–32.1)

n.s.

 % REM latency

85.5 (65–147)

48 (5–88)

<0.0001

 % REM density (unit/min)

2.1 (1.3–3.2)

4.8 (2.5–7.4)

<0.0001

  1. Abbreviations: NREM, non-rapid eye movement; n.s., nonsignificant; REM, rapid eye movement; SPT, sleep period time.
  2. Results are indicated as median and (minimum–maximum) range.
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