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Table 1 Baseline characteristics of participants of biomechanical experiment and clinical study

From: Lumbar mechanical traction: a biomechanical assessment of change at the lumbar spine

 

aDevices

N

bGender

Male: Female

bAge

(Mean)

Age

(SD)

Towing mode traction for 10 min

Biomechanical

ST-2 L/2CL

14

9:5

35.1

11.1

A1, B

 

10

4:6

47.7

9.7

A, B

OL-6500/6000

7

1:6

44.3

11.5

A, B

 

7

3:4

40.7

10.4

A, A2

net

38

17:21

41.1

11.7

 

Clinical

A → B

49

27:22

42.2

12.6

A, B

B → A

46

19:27

41.5

13.6

A, B

  1. aMINATO Medical Science, ST-2 L/2CL and OG Wellness Technologies, OL-6500/6000
  2. Towing A = Vibration amplitude load was 30% of the preload. It’s repeated for traction 30 s and suspension 5 s
  3. Towing A1 = Vibration function at the frequency of 0.1 Hz was added onto the preload. Vibration amplitude load was 30% of the preload. It’s repeated for traction 60 s and suspension 10 s
  4. Towing A2 = Vibration amplitude load was 20% of the preload. It’s repeated for traction 30 s and suspension 5 s
  5. Towing B = Traction 30 s and suspension 5 s
  6. bAccording to t-test for equality of means between A → B and B → A, age is not significant with mean difference 0.768 (95% Confidence Interval of the Difference: − 4.555 to 6.091), p = 0.775
  7. Also, in Chi-Square, there was no significant difference of the male: female ratio between A → B and B → A, p = 0.179