Fig. 1From: Epidemiological differences in levels of depressive signs among nocturnal symptoms of insomnia; results from the HUNT studyComparison of the distribution of patterns of symptoms of insomnia among the HADS-D subgroups. a = p < 0.05 for comparison of percentages within all other HADS-D groups. b = p < 0.05 for comparison of percentage of individuals experiencing Onset + Maintenance in HADS-D group “Normal”. c = p < 0.05 for comparison of percentage of individuals experiencing Onset + Maintenance + Terminal in HADS-D group “Normal”. *SOI + TI, 2%Back to article page