Table 2.

T/S ratio comparison of each subgroup in CID.

Item	Cases, n (%)	T/S Ratio	Statistic	P
Education			H = 5.694	.223
Illiteracy	13 (16.25)	1.180 (1.015, 1.630)
Primary school	26 (32.50)	1.245 (1.038, 1.490)
Middle school	25 (31.25)	1.190 (0.930, 1.783)
High school	7 (8.75)	1.100 (1.050, 1.420)
Graduate and above	9 (11.25)	1.750 (1.185, 2.190)
Anxiety			H = 10.303	.016
No symptom	17 (21.25)	1.620 (1.220, 1.857)
Mild symptom	35 (43.75)	1.190 (0.970, 1.725)
Moderate symptom	21 (26.25)	1.120 (0.875, 1.315)
Severe symptom	7 (8.75)	1.200 (1.030, 1.570)
Depression			H = 1.792	.408
No symptom	12 (15.00)	1.380 (1.112, 1.721)
Mild symptom	63 (78.75)	1.200 (1.020, 1.620)
Moderate to severe symptoms	5 (6.25)	1.030 (0.955, 1.435)
Cognition impairment			H = 9.073	.011
No	8 (10.00)	1.813 (1.365, 2.310)
Mild	34 (42.50)	1.170 (1.015, 1.553)
Moderate to severe	38 (47.50)	1.205 (1.017, 1.533)
Sleep quality			H = 14.382	.001
Satisfaction	5 (6.25)	1.620 (1.325, 2.140)
Poor	46 (57.50)	1.275 (1.075, 1.731)
Worse	29 (36.25)	1.020 (0.850, 1.310)
Total sleep time			H = 13.055	.001
<2 hours	6 (7.50)	0.865 (0.678, 1.095)
2–4 hours	56 (70.00)	1.195 (1.020, 1.523)
4–6 hours	18 (22.50)	1.595 (1.170, 1.981)
Sleep efficiency			H = 24.345	.000
<40%	13 (16.25)	1.020 (0.773, 1.085)
40–60%	50 (62.50)	1.205 (1.020, 1.493)
>60%	17 (21.25)	1.840 (1.425, 1.998)
Sleep latency			H = 3.088	.214
<15 minutes	2 (2.50)	1.210 (1.000, 1.210)
16–30 minutes	4 (5.00)	1.718 (1.350, 1.811)
31–60 minutes	6 (7.50)	1.275 (1.048, 1.574)
>60 minutes	68 (85.00)	1.195 (1.020, 1.608)

Normally distributed variables are expressed as means ± SDs; non–normally distributed variables are expressed as 50th (25th, 75th) percentiles. CID = chronic insomnia disorder, T/S ratio, relative telomere repeat copy/single-copy gene ratio.