Table 1 Results of the linear regression analysis.
From: Skin burns after high-intensity focused ultrasound ablation: a retrospective control study
Groups | Linear regression analysis results (n = 229) | ||||||
|---|---|---|---|---|---|---|---|
A (n = 223) | B (n = 6) | t | P | Collinearity diagnosis | |||
VIF | Tolerance | ||||||
Age (years) | 40.25 ± 6.30 | 41.50 ± 5.17 | −0.065 | 0.948 | 1.096 | 0.912 | |
Sonication time (s) | 610.18 ± 363.37 | 1128.17 ± 872.94 | 3.56 | 0.000** | 7.28 | 0.137 | |
Treatment time (min) | 66.79 ± 34.33 | 95.33 ± 54.36 | −2.544 | 0.012* | 4.298 | 0.233 | |
Body mass index (kg/m2) | 22.79 ± 3.43 | 23.85 ± 3.65 | 0.025 | 0.98 | 1.058 | 0.945 | |
Thickness of fat tissue on the abdominal wall (mm) | 16.89 ± 8.01 | 21.41 ± 8.98 | 1.313 | 0.191 | 1.182 | 0.846 | |
Focal depth (mm) | 91.04 ± 20.68 | 86.84 ± 26.90 | −2.556 | 0.011* | 1.373 | 0.728 | |
Total energy(J) | 255271.75 ± 174606.91 | 448266.67 ± 342760.06 | −0.036 | 0.971 | 2.947 | 2.947 | |
Ablation ratio (1 = 1:3, 2 = 1:2, 3 = 2:3) | 1 | 53 (23.77) | 1 (16.67) | −1.593 | 0.113 | 1.57 | 0.637 |
2 | 134 (60.09) | 3 (50.00) | |||||
3 | 36 (16.14) | 2 (33.33) | |||||
Abdominal scars (0 = no, 1 = yes) | 0 | 137(61.43) | 3 (50.00) | 1.204 | 0.23 | 1.102 | 0.908 |
1 | 86 (38.57) | 3 (50.00) | |||||
Water sacs (0 = no, 1 = yes) | 0 | 0 (0.00) | 1 (16.67) | −6.939 | 0.000** | 1.031 | 0.97 |
1 | 223 (100.00) | 5 (83.33) | |||||
Uterine flexion (1 = anterior, 2 = horizontal, 3 = posterior) | 1 | 131 (58.74) | 3 (50.00) | 0.982 | 0.327 | 1.193 | 0.838 |
2 | 29 (13.00) | 1 (16.67) | |||||
3 | 63 (28.25) | 2 (33.33) | |||||
F | F (11,216) = 6.750, P = 0.000 | ||||||
D-W | 0.51 | ||||||
