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Table 1 Demographic data

From: Radiological and clinical outcomes of cervical disc arthroplasty for the elderly: a comparison with young patients

  Elderly group (65 year-old) Young group (≤40 year-old) P value
Case number n = 24 n = 47  
Age (years)a 71.2 ± 4.79 (65–80) 33.9 ± 4.45 (23–39) < 0.001*
Male:Female 13:11 31:16  
Follow-up (months)a 22.6 ± 22.29 30.8 ± 21.52 0.145
Total levels 40 57  
 one-level 8 37  
 two-level 16 10  
Level distribution    0.253
 C3–4 4 2  
 C4–5 15 16  
 C5–6 17 35  
 C6–7 4 4  
Blood loss (ml)a 171.4 ± 164.75 115.2 ± 131.41 0.178
Operative time (min)a 239.4 ± 81.40 178.6 ± 58.00 0.008*
  1. aValues are presented as mean ± SD (standard deviation)
  2. *p < 0.05;