Table 2

Group differences in demographic information, PCL-5 scores and sleep quality between the RD patient group and the control group

	Patients with RD		Control		χ²/t	P value
	Mean/N	SD/%	Mean/N	SD/%	χ²/t	P value
Total	486	100.00	486	100.00
Age
18–34	223	45.90	213	43.80	3.418	0.181
35–60	203	41.80	227	46.70
>60	60	12.30	46	9.50
Gender
Male	301	61.90	302	62.10	0.004	0.947
Female	185	38.10	184	37.90
PCL-5 Scores
Total scores	18.40	11.47	11.07	10.04	−10.601	<0.001
Criterion B	4.86	3.40	3.22	3.34	−7.577	<0.001
Criterion C	2.21	1.97	0.89	1.43	−11.978	<0.001
Criterion D	6.20	4.59	3.58	3.93	−7.617	<0.001
Criterion E	5.12	3.66	3.58	3.48	−10.601	<0.001
Sleep quality
Subjective sleep quality	1.19	0.77	0.78	0.76	−8.424	<0.001
Difficulty falling asleep	1.07	1.09	0.51	0.88	−8.782	<0.001
Frequent nocturnal or early morning awakening	1.41	1.16	0.82	1.06	−8.269	<0.001
Sleep duration	0.95	0.85	0.77	0.85	−3.217	0.001