Table 1 Baseline demographic characteristics of all patients who completed the 3-year Follow-Up given as mean with standard deviation or absolute (relative) frequency. Longer cut-sew time in allergy group due to suture instead of stapling. p-values: 1Non allergy patients receiving standard TKA vs. non-allergy patients receiving coated TKA. 2 Allergy group vs. coated non-allergy group (all patients). 3 Allergy group vs. matched-pair group. * = Chi2-Test, ‡ = Mann-Whitney-U-Test
RCT | vs. Coated TKA | vs. allergy | |||||
|---|---|---|---|---|---|---|---|
Standard TKA (n = 38) | Coated TKA (n = 34) | p-value1 | allergy (n = 8) | p-value2 | Non-allergy coated (matched) (n = 8) | p-value3 | |
Age at surgery [years] | 64.7 ± 9.6 | 63.8 ± 9.4 | 0.697 | 54.3 ±11.2 | 0.018 | 63.1 ±9.2 | 0.115‡ |
Female gender | 19 (50%) | 15 (44%) | 0.618 | 8 (100%) | 0.036 | 8 (100%) | n.a. |
Comorbidities | 22 (58%) | 24 (71%) | 0.263 | ||||
ASA grade 1 or 2 | 16 (42%) | 10 (29%) | 5 (63%) | 0.575 | 5 (63%) | 1.0* | |
ASA grade 3 or 4 | 3 (38%) | 3 (38%) | |||||
BMI [kg/m²] | 30.6 ± 5.7 | 30.3 ± 5.9 | 0.858 | 33.9 ±6.7 | 0.054 | 30.0 ±4.9 | 0.141‡ |
cut-sew-time [minutes] | 85.3 ± 15.9 | 89.1 ± 11.4 | 0.250 | 101.0 ± 8.7 | 0.010 | 81 ± 7 | 0.002‡ |
Surgeon | 26 (68%) | 24 (70%) | 0.248 | ||||
Surgeon 1 | 9 (24%) | 4 (12%) | 6 (75%) | 7 (88%) | |||
Surgeon 2 | 3 (8%) | 6 (18%) | 1 (12%) | 0.725 | 1 (13%) | 0.584* | |
Surgeon 3 | 1 (12%) | 0 (0%) | |||||