Results
There were no significant differences in terms of gender distribution (Characteristics of the study population split by type of surgeryMean preoperative tibial obliquity amounted to 89.9° (range: 86°–93°). There was a significant difference in preoperative tibial obliquity depending on treatment group, with greater varus tibial obliquity in the CI (mean: 89.6° [range. 86°–93°]) than PSI group (mean: 90.6° [range: 88°–92°]; For the entire cohort, the postoperative tibial obliquity amounted to 89.9° (range: 85°–93°). There was a significant difference in postoperative tibial obliquity between treatment groups, again with greater varus obliquity in the CI (mean: 89.7° [range: 85°–93°]) than PSI group (mean: 90.5° [range: 88°–92°]; Overall, no change in tibial obliquity from pre- to postoperative larger than 2° was found. One patient presented with change in tibial obliquity between 1° and 2° (0.5%), and 62 with a change between 0° and 1° (31.0%). In the remaining 137 patients, preoperative tibial obliquity had been restored, with no deviation from preoperative measurement (68.5%).Notably, in a significantly higher proportion of patients with CI, preoperative tibial obliquity had been restored (78.0%; ICCs between reviewers for pre- (ICC = 0.988) and postoperative measurements (ICC = 0.999) showed excellent agreement.