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Table 1 Descriptive statistics for the sample we investigated in this study

From: Epidemiological differences in levels of depressive signs among nocturnal symptoms of insomnia; results from the HUNT study

  Sleep onset
(SOI)
Maintenance
(MI)
Terminal
(TI)
SOI + MIMI + TISOI + TIAll
symptoms
Tot. CasesControlsTotal
N 733133347051652796642431736167933
Females % 7271.662.180.869.680.281.973.2*57.966.2
Age M (SD) 49.5 (17.8)53.3 (16.3)57.9 (15.2)52.6 (15.3)56.2 (14.2)59.7 (18.1)56.1 (15.4)53.9 (16.2)*44.6 (14.7)49.7 (16.2)
HADS-D M (SD)Tot.4.0 (3.2)3.4 (2.9)4.1 (3.0)4.6 (3.2)4.3 (3.1)5 (3.4)5.2 (3.6)4.1 (3.2)*1.9 (2.1)3.2 (2.8)
Females3.7a3.2a3.9a4.4a4.0a4.3a5.0a3.9a1.7a2.8a
Males4.54.14.65.35.08.16.24.72.23.3
  1. *significantly different (α = 0.05) between cases and controls
  2. asignificantly lower (α = 0.05) than in males