Table 2.
Intergroup and intragroup comparison of the Oxford Knee Score.
| Time point | NMK group (n = 63) |
MK group (n = 63) |
Between-group comparison (n = 63) |
|||||
|---|---|---|---|---|---|---|---|---|
| Mean ± SD | Δ = (Preoperative − follow-up) (Mean ± SD) |
P-value | Mean ± SD | Δ = (Preoperative − follow-up) (Mean ± SD) |
P-value | Δ = (NMK − MK) (Mean ± SE) |
P-value | |
| Preoperative | 24.51 ± 6.26 | - | - | 23.83 ± 6.48 | - | - | 0.68 ± 1.1 | .550 |
| 6 mo | 33.96 ± 5.24 | −9.45 ± 2.3 | <.0001a | 34.08 ± 5.94 | −10.25 ± 3.3 | <.0001a | −0.12 ± 0.7 | .452 |
| 12 mo | 38.11 ± 5.05 | −13.60 ± 3.6 | <.0001a | 40.08 ± 4.25 | −16.25 ± 4 | <.0001a | −1.97 ± 0.8 | .016a |
| 24 mo | 39.08 ± 4.58 | −14.57 ± 3.4 | <.0001a | 41.40 ± 4.04 | −17.57 ± 4.6 | <.0001a | −2.32 ± 0.8 | .001a |
| 60 mo | 39.90 ± 4.13 | −15.39 ± 5.2 | <.0001a | 41.96 ± 3.58 | −18.13 ± 5 | <.0001a | −2.06 ± 0.7 | .001a |
In the NMK group, there was a significant improvement in patients’ Oxford Knee Score from preoperative to different stages of follow-up postoperatively, and a similar trend was also observed in the MK group (P-value < .05).
While comparing between the NMK and MK groups, no significant difference was observed in improvement of the OKS from preoperative to follow-up at 6 months.
Better improvement was observed in the MK group than in the NMK group at 12 months (NMK vs MK group: 38.11 ± 5.05 vs 40.08 ± 4.25), 24 months (NMK vs MK group: 39.08 ± 4.58 vs 41.40 ± 4.04), and 60 months (NMK vs MK group: 39.90 ± 4.13 vs 41.96 ± 3.58) (P-value < .05).
P-value < .05, statistically significant.