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Table 2 Comparisons of the results 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)
Fusion/Non-fusion (n) 21/5 18/3 0.72
Operating time (min) 284.89 ± 62.40 304.62 ± 61.64 0.28
Blood loss (ml, median (IQR)) 700 (450,950) 1200 (725,1675) 0.02a
Hospital stay (days) 10.46 ± 7.77 11.33 ± 6.58 0.68
Implant loosening (n) 11 6 0.33
  1. The continue data were compared with independent t test and the Mann-Whitney test while the categorical data were compared with Fisher’s exact test
  2. DBM demineralized bone matrix, AIBG autogenous iliac bone graft, IOR interquartile range
  3. aStatistically significant. analysed by the Mann-Whitney test