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. 2018 Feb 13;13(2):e0192088. doi: 10.1371/journal.pone.0192088

Table 1. Sample characteristics.

	All subjects	Non-Perseverators		Perseverators
	All subjects	Good Sleep	Insomnia Symptoms	Good Sleep	Insomnia Symptoms
Sample size	1126	520	122; 16.44%	350	134; 27.69%
Age	46.80±13.29	47.68±13.26	45.75±13.64	46.80±13.24	44.37±13.01	F = 2.51, p = .06
Gender (Women)	651; 57.8%	241; 46.3%^c^,^d	69; 56.6%^d	241; 68.9%^a	100; 74.6%^a^,^b	χ2 = 61.50, p < .001
Race						χ2 = 54.94, p < .001
White	752; 66.8%	370; 71.2%^b^,^d	67; 54.9%^a^,^d	241; 68.9%^b^,^d	74; 55.2%^a^,^c
Black	245; 21.8%	84; 16.2%^b^,^d	40; 32.8%^a	75; 21.4%^b^,^d	46; 34.3%^a^,^c
Asian	53; 4.7%	33; 6.3%	8; 6.6%	10; 2.9%	2; 1.5%
Hispanic or Latinx	24; 2.1%	10; 1.9%	3; 2.5%	9; 2.6%	2; 1.5%
Middle Eastern or Indian	38; 3.4%	15 2.9%	3; 2.5%	13; 3.7%	7; 5.2%
Other	13; 1.2%	8; 1.5%	1; 0.8%	2; 0.6%	3; 2.2%
Major Life Events	2.43±1.59	2.13±1.38^c^,^d	2.26±1.57^d	2.67±1.60^a^,^d	3.09±2.04^a^,^b^,^c	F = 17.50, p < .001
IES-I	14.03±5.78	9.29±1.72^c^,^d	9.51±1.82^c^,^d	20.14±2.19^a^,^b	20.59±2.63^a^,^b	F = 2720.75, p < .001
SOL	22.83±16.61	15.18±7.99^b^,^c^,^d	42.75±19.23^a^,^c^,^d	17.74±8.77^a^,^b^,^d	47.69±16.23^a^,^b^,^c	F = 456.49, p < .001
WASO	13.42±12.64	9.19±7.26^b^,^d	25.78±19.72^a^,^c	11.19±7.74^b^,^d	24.40±17.06^a^,^c	F = 127.94, p < .001

Notes:

^a = group mean value or sample proportion differs from non-perseverators with no insomnia group mean value.

^b = group mean value or sample proportion differs from non-perseverators with insomnia group mean value.

^c = group mean value or sample proportion differs from perseverators with no insomnia group mean value.

^d = group mean value or sample proportion differs from perseverators with insomnia group mean value.