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Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 4 Knee function of all patients and the two groups defined according to the time-to-reimplantation cutoff of 94 days

From: Evaluation of time to reimplantation as a risk factor in two-stage revision with static spacers for periprosthetic knee joint infection

Knee function at the last follow-up after two-stage exchange was completed

All patients (n = 163)

Groups according to time to reimplantation (TTR)

p value

 ≤ 94 days (n = 104)

 > 94 days (n = 59)

Maximum knee flexion angle in degrees at last follow-up, n (missing), median (IQR)

n = 111 (52)

90 (85–100)

n = 73 (31)

95° (90–100)

n = 38 (21)

90° (84–100)

0.0431*

Patients who achieved > 90° knee flexion at last follow-up, n (%) missing

51 (46%)

52

38 (52%)

31

13 (34%)

21

0.1078**

Oxford Knee Score at last follow-up, n (missing), median (IQR)

n = 79 (84)

17 (11–26)

n = 49 (55)

18 (12–30)

n = 30 (29)

16 (11–23)

0.2314*

  1. Bold font indicates p values  ≤ 0.05
  2. * p value from two-sided exact Mann–Whitney U test including TTR group as the only factor
  3. ** p value from Fisher’s exact test including TTR group as the only factor
  4. IQR interquartile range
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