Table 3.
Average measured ε 2 for four postoperative timepoints and two observers with 95 % confidence intervals and ICC coefficient
| Average measured ε2 angle (95 % CI) | ||||
|---|---|---|---|---|
| Early postop | 2-week postop | 2-month postop | 1-year postop | |
| Observer 1 (°) | 5.2 (4.3–6.1) | 5.9 (4.9–7.0) | 7.8 (6.1–9.5) | 6.8 (5.6–8.0) |
| Observer 2 (°) | 4.9 (4.1–5.8) | 5.6 (4.6–6.6) | 7.8 (6.1–9.5) | 6.4 (5.3–7.6) |
| ICC coefficient | 0.45 | 0.45 | 0.42 | 0.55 |
| Average inter-observer discrepancy for each single measurement (°) | 0.1 (−0.2–0.4) | 0.1 (−0.2–0.5) | 0.0 (−0.3–0.3) | 0.3 (0.0–0.6) |
| Spearman correlation coefficient | 0.91 | 0.89 | 0.94 | 0.94 |
95 % CI 95 % confidence intervals