Table 3.

Sleep status t-test analysis results under different residential densities.

Definition	High and low density		t	p
	(mean ± standard deviation)
	Low density (n = 155)	High density (n = 282)
Sleep quality	3.42 ± 0.61	3.20 ± 0.57	3.634	0.000**
Time to fall asleep	3.21 ± 0.99	2.87 ± 0.93	3.550	0.000**
Sleeping time	3.39 ± 0.96	3.08 ± 0.89	3.302	0.001**
Sleep efficiency	3.56 ± 0.95	3.24 ± 0.88	3.582	0.000**
Sleep disorder	2.60 ± 0.96	3.53 ± 0.79	−10.306	0.000**
Drug hypnosis	2.60 ± 0.86	3.39 ± 0.75	−10.028	0.000**
Disfunction	2.45 ± 0.88	3.24 ± 0.79	−9.605	0.000**

*p < 0.05,

^**p < 0.01.

**When the confidence value (double test) is 0.01, the correlation is significant.