Table 1 Patient demographics and clinicopathological factors.
From: Impact of body mass index on robotic transaxillary thyroidectomy
Total cohort | Group 1 (BMI < 25 kg/m2) | Group 2 (BMI 25–29.99 kg/m2) | Group 3 (BMI ≥ 30 kg/m2) | p value | ||
|---|---|---|---|---|---|---|
Number of patients | 3697 (100%) | 3062 (82.8%) | 559 (15.1%) | 76 (2.1%) | ||
Age (years) | 38.7 ± 9.2 | 38.2 ± 9.0 | 41.5 ± 9.2 | 38.2 ± 10.1 | <0.001* | |
Gender | 0.001* | |||||
Female | 3303 (89.3%) | 2825 (92.3%) | 422 (75.5%) | 56 (73.7%) | ||
Male | 394 (10.7%) | 237 (7.7%) | 137 (24.5%) | 20 (26.3%) | ||
Mean BMI | 22.2 ± 3.1 | 21.2 ± 2.0 | 26.7 ± 1.3 | 32.4 ± 2.4 | 0.001* | |
Mean tumor size (cm) | 0.79 ± 0.59 | 0.78 ± 0.59 | 0.81 ± 0.60 | 0.85 ± 0.78 | 0.498 | |
Malignancy | 3555 (96.2%) | 2943 (96.1%) | 538 (96.2%) | 74 (97.4%) | 0.848 | |
§TNM staging | ||||||
T | 1 | 1954 (55.0%) | 1620 (55.0%) | 291 (54.1%) | 43 (58.1%) | 0.749 |
2 | 36 (1.0%) | 33 (1.12%) | 2 (0.37%) | 1 (1.36%) | ||
3 | 1558 (43.8%) | 1284 (43.6%) | 244 (45.4%) | 30 (40.5%) | ||
4 | 7 (0.2%) | 6 (0.20%) | 1 (0.19%) | 0 (0.0%) | ||
N | 0 | 2451 (68.9%) | 2042 (69.4%) | 367 (68.2%) | 42 (56.8%) | 0.187 |
1a | 1094 (30.8%) | 892 (30.3%) | 170 (31.6%) | 32 (43.3%) | ||
1b | 10 (0.3%) | 9 (0.31%) | 1 (0.19%) | 0 (0.0%) | ||
M | 0 | 3555 (100%) | 2943 (100%) | 538 (100%) | 74 (100%) | |
1 | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | ||
Stage | I | 3036 (85.4%) | 2559 (86.9%) | 415 (77.1%) | 62 (83.8%) | |
II | 4 (0.11%) | 3 (0.1%) | 1 (0.2%) | 0 (0.0%) | ||
III | 511 (14.4%) | 378 (12.9%) | 121 (22.5%) | 12 (16.2%) | ||
IVa | 4 (0.13%) | 3 (0.1%) | 1 (0.2%) | 0 (0.0%) | ||
IVb | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) | ||
#Multifocal tumor | 0.006* | |||||
No | 2825 (77.6%) | 2368 (78.5%) | 409 (74.5%) | 48 (64.0%) | ||
Yes | 808 (22.2%) | 641 (21.3%) | 140 (25.5%) | 27 (36.0%) | ||
#Bilateral tumor | 0.359 | |||||
No | 3246 (88.7%) | 2698 (89.1%) | 482 (87.0%) | 66 (88.0%) | ||
Yes | 412 (11.3%) | 331 (10.9%) | 72 (13.0%) | 9 (12.0%) | ||
#Extracapsular invasion | 0.854 | |||||
No | 2023 (56.4%) | 1680 (56.5%) | 299 (55.1%) | 44 (59.5%) | ||
Yes | 1563 (43.5%) | 1289 (43.4%) | 244 (44.9%) | 30 (40.5%) | ||
Extent of surgery | 0.199 | |||||
Less than BTT | 2377 (64.3%) | 1987 (64.9%) | 346 (61.9%) | 44 (57.9%) | ||
BTT | 1320 (35.7%) | 1075 (35.1%) | 213 (38.1%) | 32 (42.1%) | ||
Mean no. of central nodes removed | 4.60 ± 3.85 | 4.60 ± 3.89 | 4.52 ± 3.61 | 5.30 ± 3.96 | 0.262 | |
Mean no. of positive central node | 0.74 ± 1.58 | 0.73 ± 1.58 | 0.79 ± 1.60 | 1.03 ± 1.59 | 0.208 | |
Post-operative inpatient stay (days) | 3.23 ± 1.6 | 3.22 ± 1.7 | 3.27 ± 0.9 | 3.23 ± 1.6 | 0.674 | |
Recurrence | 22 (0.6%) | 20 (0.7%) | 2 (0.4%) | 0 (0.0%) | 0.559 | |
