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. 2022 Jun 16;13:897797. doi: 10.3389/fendo.2022.897797

Table 2.

Demographics and baseline characteristics of the participants.

NIFI group (n=90) Control group (n=90) χ 2(t) Value P Value
Age, mean ± SD 42.1 ± 9.5 42.7 ± 9.1 0.369 0.713
Sex, n (%) 0.556 0.456
 Male 20 (22.2%) 16 (17.8%)
 Female 70 (77.8%) 74 (82.2%)
BMI, mean ± SD 23.6 ± 3.0 23.5 ± 2.7 -0.244 0.807
Size of the largest tumor, mean ± SD, mm 14.3 ± 8.5 13.2 ± 8.1 -0.934 0.351
Preoperative PTH, mean ± SD (pg/mL) 49.9 ± 15.5 48.1 ± 14.1 -0.835 0.405
CLND, n (%) 0.394 0.530
 Unilateral 29 (32.2%) 33 (36.7%)
 Bilateral 61 (67.8%) 57 (63.3%)
No. of resected LNs, mean ± SD 11.0 ± 6.7 9.9 ± 6.4 -1.097 0.274
No. of metastatic LNs, mean ± SD 2.8 ± 4.2 2.1 ± 2.6 -1.363 0.175

BMI, body mass index; PTH, parathyroid hormone; CLND, central lymph node dissection; LNs, lymph nodes.