Table 4. The association between PV and psychiatric disturbance

Psychiatric disturbance	Life-time PV		Chi2 p-value	OR (95% CI)	Last month PV		Chi2 p value	OR (95% CI)
	Yes	No	0.004	2.26 (1.29-3.96)	Yes	No	0.001	2.05 (1.32-3.20)
Yes	108(41.1)	20(23.5)			78(45.1)	50(28.6)
No	155(58.9)	65(76.5)			95(54.9)	125(71.4)

“Yes” for Psychiatric disturbance when the SRQ-20 score is equal to or more than 9. Life-time PV group was identified by asking “have you ever experienced PV” and last month PV group was identified by asking “in last month, have you ever experienced PV”. The OR was calculated using a logistic regression model; p<0.05 indicates a statistical significance.