295 / 324
Kaplan-Meier survival analysis was used.
Revision surgery (removal and/or conversion
to TKA), served as end-point. Complications
and reoperations were recorded. The mean fol-
low-up was 5.9 years (24-189 months).
Statistics
JMP Software (SAS Institute, Cary, NC) was
used for statistical analysis.
Survival analysis of the prosthesis was perfor-
med using the log-rank test and the
Kaplan–Meier survival analysis with a confi-
dence interval of 95%. Student’s t test and the
chi-square test were applied for further analy-
sis of the different clinical and radiological
variables. A p value <0.05 was considered
significant. ANOVA test was used to assess the
relationship between implant size and height
of patients. Our null hypothesis is that there is
no difference between men and women on the
outcome of UKA, and with a beta risk at 20%,
a difference of 6.7 points score IKS should be
solved for refuted the null hypothesis. The
standard deviation of IKS score was calculated
among all patients who receive a UKA in our
service.
RESULTS
In the male group, the mean preoperative IKS
knee and function score improved significant-
ly (p<0.001) from 61 to 94 and from 70 to
89 postoperatively, respectively. For the fema-
le group, the mean preoperative IKS knee and
function score improved significantly
(p<0.001) from 62 to 94 and from 63 to
84 postoperatively, respectively. No signifi-
cant differences were found between the
2 groups. In both groups, the mean preoperati-
ve flexion was 130 degrees and remained
unchanged at final follow-up (Table 3). No
14
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294
Table 5: Number of implant by size women
Size of the femoral implant
1
2
3
4
5
Total
Size of
0
3
3
the tibial
1
7
16
8
31
implant
2
3
3
6
3
Total
7
22
11
40
Size of the femoral implant
1
2
3
4
5
Total
Size of
0
1
1
the tibial
1
7
7
implant
2
3
16
5
24
3
1
1
1
2
3
8
Total
1
4
25
7
3
40
Table 6: Number of implant by size men