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Table 3 Progression of spondylolysis or grade-1- spondylolisthesis (Categories 2–4) to grade-2- spondylolisthesis or higher (Cat5-Cat7) by job assignments

From: Occupational influences on Spondylolysis and Spondylolisthesis in a cohort of 18-year-old male military conscripts

Categories

Administrative

Combat

Maintenance

Driving

Total

Cat2

0/84

0%

2/64

3.1%

0/8

0%

0/6

0%

2/162

1.23%

Cat3

3/649

0.5%

3/208

1.4%

1/75

1.3%

0/29

0%

7/961

0.73%

Cat4

7/319

2.2%

0/3

0%

0/48

0%

0/28

0%

7/398

1.76%

Total

10/1052

1.0%

5/275

1.8%

1/131

0.8%

0/63c

0%

16/1521

1.02%

  1. Cat2 – Asymptomatic spondylolysis
  2. Cat3 – Painful spondylolysis or asymptomatic grade 1 SLS without clinical findings
  3. Cat4 – Grade 1 Spondylolisthes with pain