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Table 1 Patient demographics

From: Retrospective study on effectiveness of Activ L total disc replacement

Patient demographics  
Sample size 87
Age (years) 44.20 ± 10.14
Male/female 48/39
Body mass index 24.34 ± 4.12
Pre-operative ODI, % 40.79 ± 1.80
Pre-operative VAS (back) 7.21 ± 0.69
Pre-operative VAS (leg) 7.15 ± 0.83
Affected segment
 L3–4 3
 L4–5 48
 L5–S1 15
 L3–L5 3
 L4–S1 18