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Table 5 Difference between the age groups on degeneration degree in four Roussouly types

From: Different spinal subtypes with varying characteristics of lumbar disc degeneration at specific level with age: a study based on an asymptomatic population

Roussouly types

L1-L2

L2-L3

L3-L4

L4-L5

L5-S1

A vs. B

B vs. C

A vs. C

A vs. B

B vs. C

A vs. C

A vs. B

B vs. C

A vs. C

A vs. B

B vs. C

A vs. C

A vs. B

B vs. C

A vs. C

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

u

P

Type I

− 0.45

0.66

− 1.84

0.07

−  2.07

0.04*

− 0.82

0.41

− 0.30

0.77

− 0.99

0.32

− 1.18

0.24

− 1.14

0.26

− 1.88

0.06

− 1.36

0.17

− 2.21

0.03*

− 2.88

0.00*

− 0.37

0.71

− 2.50

0.01*

− 1.66

0.10

Type II

− 2.04

0.04*

− 2.42

0.02*

− 3.43

0.00*

− 0.85

0.40

− 2.38

0.02*

− 2.47

0.01*

− 1.76

0.08

− 1.38

0.17

− 2.68

0.01*

− 0.95

0.34

− 1.20

0.23

− 2.20

0.03*

− 0.92

0.36

− 1.38

0.17

− 2.16

0.03*

Type III

− 0.51

0.61

− 2.59

0.01*

− 2.80

0.01*

− 0.66

0.51

− 1.37

0.17

− 1.93

0.05

− 0.21

0.84

− 3.96

0.00*

− 4.52

0.00*

− 0.51

0.61

− 3.47

0.00*

− 4.11

0.00*

− 0.56

0.57

− 1.98

0.04*

− 2.71

0.01*

Type IV

− 0.20

0.84

− 1.03

0.30

− 1.13

0.26

− 1.10

0.27

− 1.41

0.16

− 1.41

0.16

− 0.13

0.90

− 0.52

0.61

− 0.38

0.71

− 0.91

0.36

− 1.87

0.06

− 2.39

0.02*

− 0.27

0.79

− 1.19

0.23

− 1.33

0.18

  1. * There was a statistically significant difference (P < 0.05)