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Table 1 Demographics

From: Efficacy of tranexamic acid in reducing blood loss in posterior lumbar spine surgery for degenerative spinal stenosis with instability: a retrospective case control study

  tranexamic acid group SD control group SD p value
Number of patients 46   51   
Sex (M/F) 31/15   27/24   
Weight (kg) 81.98 14.53 79.78 13.99 0.449
Height (cm) 168.00 6.77 171.35 7.47 0.023
Age 67 10.5 69 9.8 0.334
PTT (s) 27 3.93 26 4.2 0.230
Duration of operation (min) 172.74 41.85 168.09 42.03 0.587
Surgical procedure      0.286
1 segment PLIF 9   17   
2 segments PLIF 23   23   
3 segments PLIF 12   8   
4 segments PLIF 1   3   
5 segments PLIF 1   0   
Surgical procedure      0.308
1 segment instrumentation 0   0   
2 segments instrumentation 0   0   
3 segments instrumentation 0   0   
4 segments instrumentation 11   8   
5 segments instrumentation 35   43   
ASA I/II/III 13/21/12   9/16/26   0.042