Skip to main content

Table 1 Demographics results

From: Similar polysomnographic pattern in primary insomnia and major depression with objective insomnia: a sign of common pathophysiology?

  Mean (SD) Normative (N = 30) Mean (SD) Insomnia (N = 84) Mean (SD) Depression (N = 95) Median (P25-P75) Normative (N = 30) Median (P25-P75) Insomnia (N = 84) Median (P25-P75) Depression (N = 95) P-value
Gender (M) 63.33% 58.33% 43.16%     0.053a
Age (years) 37.67 ± 11.16 42.38 ± 11.85 43.58 ± 12.37     0.065
BMI (kg/m2) 27.24 ± 6.05 25.85 ± 4.88 26.60 ± 6.53     0.480
ISI 4.30 ± 2.60 17.88 ± 2.77 18.82 ± 4.99 5 (3–6) 17 (15–20) 19 (17–23) <0.001b
BDI 1.13 ± 1.48 2.51 ± 1.17 14.59 ± 4.27 0 (0–2) 3 (2–3) 14 (11–17) <0.001b
ESS 5.53 ± 2.39 10.40 ± 5.17 9.94 ± 5.43 6 (4–7) 10 (7–14) 11 (6–13) <0.001b
        aPearson Chi2
bKruskal-Wallis Test
  1. BMI Body Mass Index, ISI Insomnia Severity Index, BDI Beck Depression Inventory, ESS Epworth Scale