Table 32 Performance under natural variability conditions.
Variability factor | Prevalence in independent data (95% CI) | Performance impact (mean ± SD) | Mitigation effectiveness (95% CI) | Baseline accuracy | Enhanced accuracy | Recovery rate | χ² statistic | p-value |
|---|---|---|---|---|---|---|---|---|
Equipment aging (> 10 years) | 34.7% (32.1–37.3) | -3.2 ± 1.1% accuracy | 87.3% (84.8–89.8) | 82.4% | 88.7% | 89.2% | 156.34 | < 0.001 |
Operator inexperience (< 2 years) | 23.8% (21.6–26.0) | -4.1 ± 1.4% accuracy | 89.6% (87.2–92.0) | 80.9% | 89.1% | 91.4% | 142.78 | < 0.001 |
Patient positioning errors | 41.2% (38.7–43.7) | -2.8 ± 0.9% accuracy | 91.4% (89.1–93.7) | 83.7% | 89.8% | 92.1% | 167.92 | < 0.001 |
Exposure variations | 29.6% (27.2–32.0) | -3.7 ± 1.2% accuracy | 88.9% (86.4–91.4) | 81.6% | 88.4% | 88.7% | 134.56 | < 0.001 |
Motion artifacts | 18.3% (16.4–20.2) | -5.2 ± 1.6% accuracy | 85.7% (82.8–88.6) | 78.3% | 86.9% | 85.9% | 123.45 | < 0.001 |
Environmental interference | 12.4% (10.8–14.0) | -2.3 ± 0.8% accuracy | 93.1% (90.9–95.3) | 84.9% | 90.2% | 94.1% | 89.67 | < 0.001 |
Mixed pathological presentations | 67.8% (65.4–70.2) | -1.9 ± 0.7% accuracy | 94.8% (93.1–96.5) | 85.6% | 91.3% | 95.2% | 198.23 | < 0.001 |
