Table 2.
Substudy A comparing da Vinci models S and Si.
| S (n = 92) | Si (n = 92) | p | |
|---|---|---|---|
| Age (years) | 39.5 ± 9.3 | 38.9 ± 9.0 | 0.647 |
| Sex ratio (male:female) | 1:4.1 (18:74) | 1:17.4 (5:87) | 0.004 |
| Malignancy ratio (benign:malignant) | 1:22 (4:88) | 1:17.4 (5:87) | 0.733 |
| Extent of the surgery | |||
| Lobectomy | 92 (100%) | 92 (100%) | 1.000 |
| Mean tumor size (cm) | |||
| Malignant | 0.8 (0.6–1.1) | 0.7 (0.5–0.9) | 0.098 |
| Benign | 3.1 ± 0.8 | 3.3 ± 2.1 | 0.838 |
| Pathologic classification | 0.372 | ||
| Papillary thyroid carcinoma | 86 (93.5%) | 86 (93.5%) | |
| Follicular thyroid carcinoma | 2 (2.2%) | 1 (1.1%) | |
| Medullary thyroid carcinoma | 0 (0.0%) | 0 (0.0%) | |
| Adenomatous goiter | 1 (1.1%) | 4 (4.3%) | |
| Others | 3 (3.3%) | 1 (1.1%) | |
| Percentage of hypocalcemia | 0.097 | ||
| Transient | 5 (5.4%) | 1 (1.1%) | |
| Permanent | 0 (0.0%) | 0 (0.0%) | |
| Percentage of vocal cord injury | 0.155 | ||
| Transient | 0 (0.0%) | 2 (2.2%) | |
| Permanent | 0 (0.0%) | 0 (0.0%) | |
| Operation time (mins) | 153.5 (133.0–181.3) | 158.5 (136.0–175.5) | 0.972 |