Table 1 Baseline characteristics of the two groups before PSM
BMI grouping | P value | |||
|---|---|---|---|---|
BMI < 25kg/m2(n=132) | BMI ≥ 25kg/m2(n=96) | |||
General characteristics | ||||
Age, years | 45.58±12.38 | 47.24±12.02 | 0.311 | |
Gender | Male | 23(17.4%) | 34(35.4%) | 0.003 |
Female | 109(82.6%) | 62(64.6%) | ||
Marriage | Married | 128(97.0%) | 92(95.8%) | 0.687 |
Other | 4(3.0%) | 4(4.1%) | ||
Education level | Illiteracy | 5(3.8%) | 9(9.4%) | 0.502 |
Primary | 24(18.2%) | 17(17.7%) | ||
Secondary | 67(50.8%) | 43(44.8%) | ||
Other | 36(27.3%) | 27(28.1%) | ||
Preoperative comorbidities | ||||
Hypertension | Yes | 17(12.9%) | 27(28.1%) | 0.006 |
No | 115(87.1%) | 69(71.9%) | ||
Diabetes | Yes | 4(3.0%) | 11(11.5%) | 0.015 |
No | 128(97.0%) | 85(88.5%) | ||
Hashimoto’s thyroiditis | Yes | 45(34.1%) | 75(78.1%) | 0.055 |
No | 87(65.9%) | 21(21.9%) | ||
Goiter | Yes | 37(28.0%) | 36(37.5%) | 0.151 |
No | 95(72.0%) | 60(62.5%) | ||
Fatty liver or intra-hepatic fat deposits | Yes | 29(35.4%) | 53(76.8%) | < 0.001 |
No | 53(64.6%) | 16(23.2%) | ||
Surgery-related factors | ||||
Surgical approach | Open | 117(88.6%) | 88(91.7%) | 0.510 |
Endoscopic | 15(11.4%) | 8(8.3%) | ||
Tumor multifocality | Unifocal | 31 (23.5%) | 21 (21.9%) | 0.873 |
Multifocal | 101 (76.5%) | 75 (78.1%) | ||
Extent of Lymphadenectomy | Central | 108 (81.8%) | 79 (82.3%) | 0.999 |
Lateral | 24 (18.2%) | 17 (17.7%) | ||
Capsular invasion | Yes | 42 (31.8%) | 18 (18.8%) | 0.033 |
No | 90 (68.2%) | 78 (81.3%) | ||
Nerve invasion | Yes | 3 (2.3%) | 0 (0.0%) | 0.265 |
No | 129 (97.7%) | 96 (100.0%) | ||
Vascular invasion | Yes | 5 (3.8%) | 2 (2.1%) | 0.702 |
No | 127 (96.2%) | 94 (97.9%) | ||
Tumor maximal diameter, cm | 1.06±0.99 | 0.93±0.58 | 0.199 | |
Surgery duration, minutes | 104.72±32.48 | 104.23±33.45 | 0.921 | |
Intraoperative blood loss, ml | 22.83±11.22 | 25.94±13.58 | 0.201 | |
Length of hospital stay, days | 3.91±1.31 | 4.14±1.87 | 0.283 | |
Biochemical indicators | ||||
TC, mmol/L | 4.70±0.94 | 4.68±0.93 | 0.849 | |
TG, mmol/L | 1.41±0.79 | 2.03±1.51 | < 0.001 | |
HDL-C, mmol/L | 1.31±0.31 | 1.11±0.21 | < 0.001 | |
LDL-C, mmol/L | 2.66±0.74 | 2.73±0.70 | 0.546 | |
Serum creatinine,µmol/L | 59.90±12.74 | 66.57±17.96 | 0.002 | |
Pre-calcium levels, mmol/L | 2.35±0.09 | 2.35±0.08 | 0.945 | |
Pre-PTH level, pg/ml | 42.51±10.49 | 43.60±11.85 | 0.464 | |