Table 2.

Correlations for the main variables

Variable	Mean (SD)	1	2	3	4
1. Mental health problems	7.77 (10.64)	1
2. Life satisfaction	27.87 (5.58)	− 0.39**	1
3. Sleep disturbance	4.29 (3.60)	0.39**	− 0.27**	1
4. Per capita bedroom area	10.76 (5.25)	− 0.11**	0.08*	− 0.02	1

Note: SD Standard deviation

^**P < 0.01

^*P < 0.05