Table 2. Demographic and clinico-pathological characteristics of patients with different BMI.
| characteristic | BMI < 18.5 N (%) | 18.5 ≤ BMI < 24 N (%) | 24 ≤ BMI < 28 N (%) | BMI ≥ 28 N (%) | χ2 | P |
|---|---|---|---|---|---|---|
| gender | ||||||
| male | 0(0.00) | 78(12.44) | 141(24.23) | 127(35.98) | 80.28 | <0.0001 |
| female | 17(100.00) | 549(87.56) | 441(75.77) | 226(64.02) | ||
| age | ||||||
| <55 | 14(82.35) | 494(78.79) | 378(64.95) | 242(68.75) | 27.05 | <0.0001 |
| ≥55 | 3(17.65) | 133(21.21) | 204(35.05) | 110(31.25) | ||
| TSH | ||||||
| normal | 16(94.12) | 590(94.10) | 552(94.85) | 327(92.63) | 1.92 | 0.5884 |
| abnormal | 1(5.88) | 37(5.90) | 30(5.15) | 26(7.37) | ||
| Number of tumors | ||||||
| 1 | 12(70.59) | 415(66.19) | 373(64.09) | 218(61.76) | 2.26 | 0.5207 |
| ≥2 | 5(29.41) | 212(33.81) | 209(35.91) | 135(38.24) | ||
| Tumor size | ||||||
| <1 | 8(47.06) | 374(59.65) | 326(56.01) | 198(56.09) | 2.74 | 0.4327 |
| ≥1 | 9(52.94) | 253(40.35) | 256(43.99) | 155(43.91) | ||
| Extrathyroidal extension | ||||||
| absent | 16(94.12) | 567(90.43) | 475(81.62) | 293(83.00) | 22.25 | <0.0001 |
| present | 1(5.88) | 60(9.57) | 107(18.38) | 60(17.00) | ||
| lymph node metastasis | ||||||
| absent | 8(47.06) | 348(55.50) | 332(57.04) | 187(52.97) | 1.96 | 0.5810 |
| present | 9(52.94) | 279(44.50) | 250(42.96) | 166(47.03) | ||
| T staging | ||||||
| I + II | 16(94.12) | 567(90.43) | 474(81.44) | 293(83.00) | 22.81 | <0.0001 |
| III + IV | 1(5.88) | 60(9.57) | 108(18.56) | 60(17.00) | ||
| TNM staging | ||||||
| I + II | 17(100.00) | 617(98.41) | 545(93.64) | 336(95.18) | — | 0.0002* |
| III + IV | 0(0.00) | 10(1.59) | 37(6.36) | 17(4.82) | ||
Notes.
*
Fisher’s exact test was performed because one expected frequency less than 1.