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Table 1 Incidence of PTMC a in relation to sex, age, BTD b and extent of surgery

From: Retrospective evaluation of the incidental finding of 403 papillary thyroid microcarcinomas in 2466 patients undergoing thyroid surgery for presumed benign thyroid disease

  All cases Cases with PTMC Cases without PTMC Pearson chi-square
N % N % N % Value p
Sex
Males 338 13.7 58 17.2 280 82.8 .191 .692
Females 2128 86.3 345 16.2 1783 83.8
Age
<20 29 1.2 4 13.8 25 86.2 3.920 .687
21-30 173 7.0 20 11.6 153 88.4
31-40 353 14.3 56 15.9 297 84.1
41-50 489 19.8 84 17.2 405 82.8
51-60 684 27.7 119 17.4 565 82.6
61-70 545 22.1 88 16.2 457 83.8
70+ 193 7.8 32 16.6 161 83.4
BTD
MNGc 1143 46.4 188 16.4 955 83.6 .017 .913
Hashimoto 317 12.9 72 22.7 245 77.3 10.799 .001
Graves 457 18.5 65 14.2 392 85.8 1.842 .183
Plummer's 278 11.3 38 13.7 240 86.3 1.638 .228
SHTNd 136 5.5 9 6.6 127 93.4 9.956 .001
Benign tumour 875 35.5 142 16.2 733 83.8 .013 .955
Extent of surgery
HT groupe 762 30.9 102 13.4 660 86.6 7.050 .008
TT groupf 1704 69.1 301 17.7 1403 82.3
Total 2466 100 403 16.3 2063 83.7 N/A
  1. aPapillary thyroid microcarcinoma; bBenign thyroid disease; cMNG Multinodular goitre; dSHTN Solitary hyperfunctional thyroid nodule; eLess than total or near-total thyroidectomy; fTotal or near-total thyroidectomy.