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Table 2 Patient characteristics at baseline.

From: Influence of preoperative nucleus pulposus status and radiculopathy on outcomes in mono-segmental lumbar total disc replacement: results from a nationwide registry

  DDD HNP-No rad. Stenosis HNP-Rad.  
  n = 160 (36.9%) n = 68 (15.7%) n = 73 (16.9%) n = 132 (30.5%) Group comparison (p-value)
Mean age (yrs.) 41.8 41.1 42.7 41.4 0.83
Age range (yrs.) 20-65 19-65 24-61 20-62 n.a.
Females (%) 66.3 52.9 54.8 58.3 0.15
Occupat. sedentary work (%) 29.8 31.2 26.5 31.4  
Occupat. physical work (%) 48.6 50.8 52.9 55.1  
Occupat. housewife (%) 13.9 16.4 14.7 9.3 0.59
Occupat. retired (%) 3.5 1.6 1.5 1.7  
Occupat. unemployed (%) 4.2 0 4.4 2.5  
Work capacity 100% (%) 71.2 81.8 58.2 69.5  
Work capacity 50-90% (%) 11.4 12.7 27.3 17.1 0.37
Work capacity 10-40% (%) 3.8 0 3.6 1.9  
Unable to work (%) 13.6 5.5 10.9 11.4  
No preop. medication (%) 3.6 4.7 2.2 1.3  
Preop. NSAIDs (%) 66.3 67.1 67.7 70.5 0.39
Preop. opiates (%) 30.1 28.2 30.1 28.2  
L2/3 (%)* 1.3    0.8  
L3/4 (%) 9.7 2.9 5.6 1.5  
L4/5 (%) 47.1 39.7 45.8 48.5 0.10
L5/S1 (%) 41.9 57.4 48.6 49.2  
  1. *3 cases, not part of the analysis; n.a. - not analysed