Table 2.

The relationship between childhood trauma subtypes and different sleep disturbances in severe mental disorders (Mann–Whitney U test)

	Insomnia			Hypersomnia			Delayed sleep phase
	Median Insomnia N = 344	Median no Insomnia N = 422	Statistics	Median Hypersomnia N = 231	Median no Hypersomnia N = 535	Statistics	Median DSP N = 58	Median no DSP N = 708	Statistics
Childhood trauma total	40.0	38.0	U = 52 813.50 z = −3.39 p = 0.001	38.0	40.0	U = 46 063.50 z = −2.72 p < 0.01	38.0	39.0	U = 17 355.00 z = −0.00 p = 0.999
Physical abuse	5.0	5.0	U = 62 990.00 z = −3.18 p < 0.001	5.0	5.0	U = 55 018.00 z = −2.29 p < 0.05	5.0	5.0	U = 19 704.00 z = −0.45 p = 0.655
Sexual abuse	5.0	5.0	U = 64 928.00 z = −1.8 p = 0.072	5.0	5.0	U = 56 587.00 z = −1.01 p = .312	5.0	5.0	U = 19 483.00 z = −0.15 p = 0.882
Emotional abuse	10.0	9.0	U = 57 187.50 z = −4.26 p < 0.001	8.0	10.0	U = 50 591.50 z = −3.32 p < 0.001	10.0	9.0	U = 18 756.00 z = −0.65 p = 0.514
Emotional neglect	11.0	10.0	U = 61 418.00 z = −2.53 p < 0.01	10.0	11.0	U = 53 263.00 z = −1.99 p < 0.05	11.0	11.0	U = 18 794.00 z = −0.14 p = 0.890
Physical neglect	7.0	6.0	U = 65 805.00 z = −1.66 p = 0.098	6.0	7.0	U = 56 890.50 z = −1.23 p = .221	7.0	7.0	U = 19 654.50 z = −0.38 p = 0.707