Types

Numbers (n = 95)

Percentages (%)

Location

Unilateral

26

27.36

Bilateral

69

72.64

L4

12

12.64

L5

32

33.68

S1

35

36.84

Time

Not specified

7

7.36

Mechanical

57

60

Nightly

17

17.90

Mixt

6

6.32

Not specified

15

15.78