Table 2.

Risk Factors Meta-Analysis

Factors	No. studies	Sample size	I2 (%)	Pooled OR	95% CI		Test for overall effect (P value)
					Lower	Upper
Female sex	4	4696	18.9	1.93	1.59	2.33	0.296
High age	2	2113	0.0	1.26	0.94	1.69	0.413
High education level	4	5024	0.0	0.71	0.50	1.01	0.683
Low income	4	5798	76.1	2.55	1.68	3.85	0.006
Poor marital status	7	6730	76.5	1.75	1.29	2.38	0.000
Avoid alcohol	2	3903	82.3	1.64	0.52	5.23	0.017
Smoking	1	2911	0	1.49	1.11	2.00	0.000
Chronic disease	4	5159	82.8	1.49	1.07	2.08	0.001
Long sleep duration/high sleep quality	4	3903	82.9	0.59	0.34	1.03	0.001
Physical inactivity	2	3782	85.9	2.37	1.28	4.38	0.008
Poor relationship with children	6	8506	89.4	1.88	1.19	2.98	0.000
Poor relationship with spouse	2	742	80.3	1.67	1.11	2.51	0.024
Social support	3	3395	0.0	0.65	0.53	0.80	0.380