Table 2– Sleep measurements
MalesFemalesAll
Subjects284270
TST h5.6±1.2 (2.5–7.3)5.4±1.2 (1.9–7.7)5.5±1.2 (1.9–7.7)
N1 % TST12.7±16.1 (2.0–35.0)9.0±7.6 (1.0–86.0)10.4±11.8 (1.0–86.0)
N2 % TST78.3±16.4 (45.0–98.0)78.3±12.8 (14.0–95.0)75.7±14.6 (14.0–98.0)
N3 % TST8.8±10.1 (0.0–39.0)8.5±11.7 (0.0–44.0)8.6±11.0 (0.0–44.0)
REM stage % TST6.6±7.5 (0.0–36.0)4.3±5.9 (0.0–18.0)5.3±6.7 (0.0–36.0)
  • Data are presented as n or mean±sd (range). TST: total sleep time; N1: stage N1 of non-rapid eye movement (REM) sleep as a percentage of TST; N2: stage N2 of non-REM sleep as a percentage of TST; N3: stage N3 of non-REM sleep as a percentage of TST; REM stage: REM stage of sleep as a percentage of TST.