Table 1 Basic characteristics of the patients enrolled in this study(n = 95)

Gender

affected side

 Male

34(35.79)

Left

37(38.95)

 Female

61(64.21)

Right

58(61.05)

Onset age(Y)

duration(Y)

  < 40

9(9.47)

 < 5

56(58.95)

 40–59

47(49.47)

5–9

26(27.37)

  ≥ 60

39(41.05)

 ≥ 10

13(13.68)

Branches

trigger maneuvers

 V 1

4(4.21)

no

12(12.63)

 V2

45(47.37)

yes

83(87.37)

 V3

14(14.74)

touching^a

64(77.11)

 V1 + V2

5(5.26)

eating^a

42(50.60)

 V2 + V3

25(26.32)

talking^a

41(49.40)

 V1 + V2 + V3

2(2.11)

brushing^a

31(37.35)