Table 3. Characteristics of respondents experienced PV in last month

Characteristics		PV in last month (n=173)	%
Bothersome of PV
	Normal	128	74.0
	Bothersome	33	19.1
	Very bothersome	12	6.9
Number of PV (n=152)
	1-2 times	59	38.8
	3-4 times	40	26.3
	5-6 times	26	17.1
	7-8 times	8	5.3
	9-10 times	11	7.2
	>10 times	8	5.3
Need for medical treatment to stop PV
	Yes	74	42.7
	No	99	57.3
Waiting for phone calls or messages before experiencing PV (n=168)
	Yes	104	60.1
	No	64	37.0
The most time when experiencing PV*
	Driving	96	55.5
	Studying	48	27.7
	Walking	29	16.8
	Working	17	9.8
	Resting	16	9.2
	Not know/ not pay attention	19	11.0

The total percent is not 100 since this is a multiple response question.