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Table 3 Outcomes of perioperative, fusion, and complications situation.

From: Arthroscopic ankle fusion only has a limited advantage over the open operation if osseous operation type is the same: a retrospective comparative study

 Between-group difference (all patients)Difference detailed into subgroup (osseous operation type: not same)Difference detailed into subgroup (osseous operation type: same)Internal difference of OAF group (osseous operation type: not same)
AAF (n = 17)OAF (n = 26)PAAF (n = 17)COO (n = 15)PAAF (n = 17)SOO (n = 11)PCOO (n = 15)SOO (n = 11)P
Mean of surgical time (min.)140.5 ± 22.2138.5 ± 24.60.775140.5 ± 22.2149.3 ± 23.10.284140.5 ± 22.2123.6 ± 18.60.046149.3 ± 23.1123.6 ± 18.60.006
Mean of intra-op blood loss (ml)137.1 ± 49.7184.6 ± 62.90.012137.1 ± 49.7206.7 ± 67.80.002137.1 ± 49.7154.5 ± 41.60.343206.7 ± 67.8154.5 ± 41.60.034
Mean of reduction of ALB * (g/L)1.28 ± 0.283.35 ± 1.190.0001.28 ± 0.283.49 ± 1.220.0001.28 ± 0.283.15 ± 1.190.0003.49 ± 1.223.15 ± 1.190.474
Mean of total hospital stays (days)6.3 ± 2.511.0 ± 2.70.0006.3 ± 2.511.4 ± 3.40.0006.3 ± 2.510.5 ± 1.50.00011.4 ± 3.410.5 ± 1.50.396
Mean of union time (weeks)12.4 ± 1.914.6 ± 3.40.01912.4 ± 1.915.5 ± 3.50.00312.4 ± 1.912.8 ± 2.30.56315.5 ± 3.512.8 ± 2.30.035
No fusion (No. and %)02 (7.7%) 02 (13.3%) 00 2 (13.3%)0 
Complications situationAAFgroup: transient paralysis of nerve (one case)
SCsubgroup: delayed wound healing (three cases); transient paralysis of nerve (two cases); infection (one case)
NSCsubgroup: delayed wound healing (one case); transient paralysis of nerve (one case)
  1. AAF arthroscopic ankle fusion group, OAF open ankle fusion group (demographic composition: OAF = COO + SOO), COO complex osseous operation, SOO simple osseous operation; reduction of ALB: The difference of albumin value between preoperative 2 days and postoperative 2 days. P P values: α = 0.05, (Independent-samples t test)