Skip to main content

Table 2 Patients etiology conditions

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) COO (n = 15)SOO (n = 11)P
Etiology (No. and %)
 Osteoarthritis7 (41.2%)2 (7.7%)0.0087 (41.2%)00.0057 (41.2%)2 (18.2%)0.20302 (18.2%)0.086
 Post-trauma arthritis (fracture)3 (17.6%)11 (42.3%)0.0923 (17.6%)7 (46.7%)0.0773 (17.6%)4 (36.4%)0.2647 (46.7%)4 (36.4%)0.599
 Posttrauma arthritis (ligament lesions)5 (29.4%)1 (3.8%)0.0185 (29.4%)00.0225 (29.4%)1 (9.1%)0.20101 (9.1%)0.234
 Infectious arthritis2 (11.8%)2 (7.7%)0.6532 (11.8%)1 (6.7%)0.6212 (11.8%)1 (9.1%)0.8231 (6.7%)1 (9.1%)0.819
 Rheumatoid arthritis02 (7.7%)0.24200NS02 (18.2%)0.06802 (18.2%)0.086
 Urarthritis01 (3.8%)0.41300NS01 (9.1%)0.20601 (9.1%)0.234
 Talus necrosis04 (15.4%)0.03804 (26.7%)0.02300NS4 (26.7%)00.026
 Clubfoot02 (7.7%)0.24202 (13.3%)0.12000NS2 (13.3%)00.128
 Charcot arthritis01 (3.8%)0.41301 (6.7%)0.27900NS1 (6.7%)00.288
  1. AAF arthroscopic ankle fusion group, OAF open ankle fusion group (demographic composition: OAF = COO + SOO), COO complex osseous operation, SOO simple osseous operation. P P values: α = 0.05 (Chi-squared test)