Table 3.
Substudy B comparing da Vinci models Si, X, and Xi.
| Si (n = 21) | X (n = 67) | Xi (n = 387) | F | p | |
|---|---|---|---|---|---|
| Age (years) | 42.9 ± 10.0 | 41.1 ± 9.1 | 40.5 ± 10.4 | 0.631 | 0.533 |
| Sex ratio (male:female) | 1:6 (3:18) | 1:2.7 (18:49) | 1:3.7 (83:304) | 0.422 | |
| Malignancy ratio (benign:malignant) | 1:20 (1:20) | 1:10.2 (6:61) | 1:18.4 (20:367) | 0.458 | |
| Extent of the surgery | |||||
| Lobectomy | 21 (100%) | 67 (100%) | 387 (100%) | 1.000 | |
| Mean tumor size (cm) | |||||
| Malignant | 0.9 ± 0.5 | 1.1 ± 0.6 | 1.1 ± 0.8 | 0.578 | 0.561 |
| Benign | 4.7 | 2.3 ± 1.4 | 2.8 ± 1.0 | 2.080 | 0.147 |
| Pathologic classification | 0.946 | ||||
| PTC | 20 (95.2%) | 60 (89.6%) | 357 (92.2%) | ||
| FTC | 0 (0.0%) | 1 (1.5%) | 8 (2.1%) | ||
| MTC | 0 (0.0%) | 0 (0.0%) | 1 (0.3%) | ||
| AG | 0 (0.0%) | 1 (1.5%) | 6 (1.6%) | ||
| Others | 1 (4.8%) | 5 (7.5%) | 15 (3.9%) | ||
| Percentage of hypocalcemia | 0.536 | ||||
| Transient | 0 (0.0%) | 2 (3.0%) | 3 (0.8%) | ||
| Permanent | 0 (0.0%) | 0 (0.0%) | 1 (0.3%) | ||
| Percentage of vocal cord injury | 0.063 | ||||
| Transient | 1 (4.8%) | 4 (6.0%) | 6 (1.6%) | 0.064 | |
| Permanent | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | ||
| Operation time (mins) | 124.7 ± 19.0 | 127.5 ± 23.4 | 116.7 ± 22.9 | 7.157 | 0.001 |
PTC, papillary thyroid carcinoma; FTC, follicular thyroid carcinoma; MTC, medullary thyroid carcinoma; AG, adenomatous goiter.