Table 2 Lumbar facet measurements in control and degenerative spondylolisthesis groups

Left Width

Males

Control

16.72

(2.21)

16.93

(1.62)

^b18.45

(1.89)

18.16

(2.32)

19.45

(2.69)

DS

16.23

(1.98)

16.28

(1.20)

^b16.62

(1.47)

17.31

(1.61)

20.51

(2.42)

Females

Control

15.03

(1.86)

15.50

(2.40)

16.02

(1.55)

16.73

(1.81)

^a17.71

(3.23)

DS

14.85

(1.24)

15.44

(1.93)

16.41

(2.04)

17.63

(3.26)

^a19.92

(3.45)

Right Width

Males

Control

16.88

(2.62)

16.58

(2.24)

18.16

(1.96)

17.85

(2.08)

19.09

(2.30)

DS

15.43

(2.2)

15.80

(1.84)

17.29

(2.19)

17.90

(3.20)

19.61

(2.71)

Females

Control

14.98

(2.26)

15.41

(2.27)

16.17

(2.11)

^b16.03

(1.59)

^a17.52

(3.14)

DS

15.27

(1.84)

15.74

(2.55)

16.30

(1.54)

^b17.76

(2.35)

^a20.37

(4.93)

Superior Inter-facet Width

Males

Control

16.12

(1.78)

16.58

(2.12)

^a15.56

(2.31)

^b17.13

(2.45)

22.74

(4.76)

DS

15.90

(1.74)

17.22

(2.73)

^a17.26

(2.96)

^b20.47

(4.83)

24.74

(6.04)

Females

Control

13.83

(2.40)

14.09

(2.98)

^a14.76

(1.61)

^b16.01

(2.85)

20.80

(5.54)

DS

13.57

(2.86)

15.61

(2.66)

^a16.14

(3.06)

^b20.22

(4.53)

19.62

(5.86)

Inferior Inter-facet Width

Males

Control

31.92

(3.79)

31.08

(4.68)

33.51

(4.74)

37.19

(6.21)

48.56

(7.71)

DS

30.44

(2.56)

31.61

(3.45)

33.56

(6.10)

39.20

(6.84)

46.20

(12.71)

Females

Control

29.75

(3.65)

29.10

(3.28)

31.32

(3.50)

36.01

(4.93)

46.05

(8.73)

DS

28.31

(4.23)

29.04

(3.70)

32.61

(3.91)

37.35

(5.67)

45.41

(7.23)

Left Transverse facet

Males

Control

33.10

(7.95)

29.13

(7.94)

31.58

(10.45)

37.70

(9.39)

46.58

(9.10)

DS

30.71

(6.34)

32.17

(7.94)

34.30

(11.04)

37.61

(11.54)

38.14

(16.02)

Females

Control

34.05

(6.91)

33.56

(8.94)

34.64

(9.32)

^b41.25

(9.10)

45.68

(11.15)

DS

34.49

(7.64)

30.03

(6.45)

34.11

(5.83)

^b33.25

(10.70)

41.42

(10.31)

Right Transverse facet

Males

Control

31.38

(8.36)

29.71

(7.24)

33.08

(8.30)

36.22

(11.48)

44.17

(13.17)

DS

29.67

(9.66)

28.06

(6.97)

30.47

(8.96)

37.82

(11.35)

47.08

(12.84)

Females

Control

^a33.24

(7.97)

30.52

(8.56)

35.50

(6.89)

^a39.84

(9.22)

43.25

(12.50)

DS

^a28.57

(6.30)

26.21

(7.49)

32.50

(7.65)

^a34.00

(10.42)

45.47

(10.85)

Transverse Inter-facet

Males

Control

62.70

(15.80)

57.63

(13.45)

61.42

(15.48)

70.48

(15.47)

71.00

(11.23)

DS

56.73

(9.57)

58.59

(11.24)

61.17

(17.65)

67.25

(13.03)

63.55

(15.79)

Females

Control

68.90

(13.22)

^b63.44

(16.10)

68.64

(13.35)

^a75.58

(10.86)

74.72

(10.94)

DS

61.80

(10.73)

^b54.64

(9.39)

64.12

(12.18)

^a65.57

(19.49)

72.20

(12.52)