How to predict early clinical outcomes and evaluate the quality of primary total knee arthroplasty: a new scoring system based on lower-extremity angles of alignment

Table 2 Inter-observer correlations for post-operative radiological outcomes

Radiological Outcomes	Observer A	Observer B	ICC (95% CI)	P-value
DFVR (°)^a	5.61 (4.05, 7.37)	5.74 (4.13, 7.59)	0.998 (0.997–0.999)	P < 0.001
STA (°)^b	87.74 ± 3.52	87.32 ± 3.61	0.992 (0.989–0.995)	P < 0.001
SFA (°)^a	2.30 (1.33, 4.61)	2.55 (1.43, 5.02)	0.970 (0.955–0.980)	P < 0.001
CFA (°)^b	95.24 ± 2.76	95.62 ± 2.76	0.994 (0.991–0.996)	P < 0.001
mMPTA (°)^b	89.34 ± 2.65	89.33 ± 2.87	0.983 (0.975–0.989)	P < 0.001
mLDFA (°)^b	91.37 ± 3.04	90.94 ± 3.08	0.997 (0.995–0.998)	P < 0.001
JLOA (°)^b	2.93 ± 2.14	2.57 ± 2.11	0.990 (0.984–0.993)	P < 0.001

^aData are non-normally distributed and expressed as M (P25, P75). ^bData are normally distributed and expressed as \( \overline{x} \)± SD. M: median. P25: 25th percentile, P75: 75th percentile. x̄: mean. SD standard deviation, ICC intra-class correlation coefficient, CI confidence interval, DFVR distal femoral valgus resection, mMPTA mechanical medial proximal tibial angle, mLDFA mechanical lateral distal femoral angle, CFA coronal femoral angle, SFA sagittal femoral angle, STA sagittal tibial angle, JLOA joint line orientation angle

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