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Table 2 Comparison of selected sleep parameters: the parameters are based on time in bed (TIB), between controls and depressed patients (REM: rapid eye movement, REM-dens: REM-density, S2: stage 2, SOL: sleep onset latency, SWS: slow wave sleep, WASO: Wake after sleep onset).

From: The Renin-Angiotensin-Aldosterone system in patients with depression compared to controls – a sleep endocrine study

  depressed patients controls significance
TIB (min) 479.2 ± 2.6 481.1 ± 4.3 n.s.
SOL (min) 15.7 ± 11.5 26.4 ± 25.0 n.s.
REM latency (min) 97.3 ± 128.0 115.4 ± 90.0 n.s.
REM dens. (min-1) 4.45 ± 1.66 4.46 ± 1.73 n.s.
REM (min) 92.0 ± 46.2 77.9 ± 33.3 n.s.
S2 (min) 202.6 ± 39.2 216.9 ± 59.0 n.s.
SWS (min) 17.1 ± 12.7 34.1 ± 31.3 n.s.
WASO (min) 91.4 ± 69.7 73.7 ± 79.8 n.s.