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Table 4 Data from the 3 patients in the external validation group. Ranges of motion per individual per segment expressed in degrees, for both T1 and T2. Important to note that this only concerns the second half of extension in this group. tROM = total range of motion from C4-C7, sROM = segmental range of motion, SD = standard deviation

From: An observational study of quality of motion in the aging cervical spine: sequence of segmental contributions in dynamic fluoroscopy recordings

External validation

T1

T2

Presence of normal sequence ( ±)

tROM (˚)

C4-C7

sROM (˚)

C4-C5

sROM (˚)

C5-C6

sROM (˚)

C6-C7

tROM (˚)

C4-C7

sROM (˚)

C4-C5

sROM (˚)

C5-C6

sROM (˚)

C6-C7

T1

T2

E1

11.2

7.4

1.00

2.8

12.4

6.2

3.3

2.8

-

-

E2

10.6

4.2

4.4

2.0

10.3

4.1

5.4

0.7

-

-

E3

8.2

2.2

2.5

3.5

12.6

4.0

4.2

4.3

-

-

Average ± SD

10.0 [8.2;11.2]

4.6 [2.2;7.4]

2.6 [1;4.4]

2.8 [2;3.5]

11.8 [10.3[12.6]

4.8 [4;6.2]

4.3 [3.3;5.4]

2.6 [0.7;4.3]

0%

0%