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Table 1 Comparisons of demographic data between groups

From: The fusion rate of demineralized bone matrix compared with autogenous iliac bone graft for long multi-segment posterolateral spinal fusion

  Group Significance test
DBM AIBG
(n = 26) (n = 21) (p-value)
Age (years) 67.19 ± 9.42 65.10 ± 6.66 0.39
Gender (n, male/female) 6:20 5:16 1.00
TLIF/PLIF (n) 12 8 0.58
Operative levels (n) 13 three-level 11 three-level 0.58
11 four-level 9 four-level
1 five-level 1 six-level
1 seven-level  
  1. The continue data were compared with independent t test while the categorical data were compared with Chi-square test or Fisher’s exact test
  2. DBM demineralized bone matrix, AIBG autogenous iliac bone graft, TLIF transforaminal lumbar interbody fusion, PLIF posterior lumbar interbody fusion