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Table 1 Comparison of demographic and polysomnographic data between men and women groups

From: Alterations of neural network organization during REM sleep in women: implication for sex differences in vulnerability to mood disorders

 Median (P25–P75)
Men group (N = 28)
Median (P25–P75)
Women group (N = 16)
P value
Demographic variables
 Age (years)25 (22–34.5)22.5 (21.5–25)0.157
 BDI score1 (0–3)4 (3–6)< 0.001
 Social status  0.336
  Unmarried60.7%75.0%
  Married39.3%25.0%
 Educational level  0.165
  University students46.4%75.0%
  University graduates21.4%6.3%
  Non-university graduates23.1%18.7%
 Smoking  0.552
  No92.9%87.5%
  Yes7.1%12.5%
 Alcohol  0.832
  No78.6%81.2%
  Occasional21.4%18.8%
 Caffeine  0.447
  No42.9%31.2%
  Yes57.1%68.8%
Polysomnographic variables
 SL (min)20.83 (13.67–31.50)34.34 (19.67–61.00)0.038
 SE (%)87.33 (84.18–91.65)87.12 (83.03–93.34)0.961
 SPT (min)536.50 (509.33–564.00)510.84 (499.17–518.67)0.031
 TST (min)493.67 (466.67–515.50)476.00 (452.17–497.67)0.113
 WASO (%)6.87 (5.00–11.75)5.41 (2.72–11.17)0.223
  Stage 1 (%)6.90 (5.76–8.96)5.35 (4.21–6.68)0.017
  Stage 2 (%)51.70 (47.07–55.29)45.89 (41.84–53.90)0.118
  Stage 3 (%)6.06 (5.01–7.06)7.02 (5.24–7.65)0.278
  Stage 4 (%)7.27 (4.23–11.20)10.91 (5.87–13.06)0.134
  SWS (%)14.43 (10.32–16.99)16.93 (12.73–20.98)0.140
  REM (%)20.04 (17.75–21.71)22.19 (20.37–24.29)0.036
  REM latency (min)66.50 (58.17–77.17)52.50 (49.17–63.83)0.047
  1. BDI Beck depression inventory, SL Sleep latency, SE Sleep efficiency, SPT Sleep period time, TST Total sleep time, REM Rapid eye movement sleep, WASO wake after sleep onset.