Table 1 Baseline characteristics of patients before propensity score matching
Variables | Open group | Robot group | P value |
|---|---|---|---|
n = 689 | n = 126 | ||
Age, years (mean ± SD) | 52.15 ± 12.06 | 39.86 ± 10.29 | < 0.001 |
Gender | 0.351 | ||
Male (%) | 110 (16.0) | 16 (12.7) | |
Female (%) | 579 (84.0) | 110 (87.3) | |
BMI (median (range)) | 24.45 (17.10–37.79) | 23.40 (15.45–37.77) | 0.001 |
Extent of surgery | 0.027 | ||
Total thyroidectomy (%) | 583 (84.6) | 99 (78.6) | |
Subtotal thyroidectomy (%) | 1 (0.1) | 2 (1.6) | |
Lobectomy (%) | 105 (15.2) | 25 (19.8) | |
Lymph nodes dissection | 0.400 | ||
None (%) | 67 (9.7) | 21 (16.7) | |
Unilateral (%) | 461 (66.9) | 83 (65.9) | |
Bilateral (%) | 161 (23.4) | 22 (17.5) | |
No. of metastatic lymph nodes (mean ± SD (range)) | 0.90 ± 2.07 (0–19) | 0.70 ± 1.54 (0–9) | 0.611 |
No. of retrieved lymph nodes (mean ± SD (range)) | 5.12 ± 4.52 (0–35) | 3.35 ± 3.48 (0–17) | < 0.001 |
Tumor size (cm, median (range)) | 0.76 (0.1–4.7) | 0.74 (0.2–2.5) | 0.389 |
Multiplicity (%) | 201 (29.2) | 31 (24.6) | 0.334 |
Bilaterality (%) | 157 (26.9, 157/584) | 23 (22.8, 23/101) | 0.294 |
Extrathyroidal extension (%) | 281 (40.8) | 45 (35.7) | 0.323 |
Stage (%) | < 0.001 | ||
I | 405 (58.8) | 109 (86.5) | |
II | 6 (0.9) | 0 (0) | |
III | 278 (40.3) | 17 (13.5) | |
IV | 0 (0) | 0 (0) |