Association between macrocalcification and papillary thyroid carcinoma and corresponding valuable diagnostic tool: retrospective study

Table 2 Comparison of PTC incidence among groups and corresponding stratified analysis by age

	Macrocalcification	Microcalcification	Non-calcification	P Value
PTC	112 (31.5%)^a	207 (53.9%)^b	443 (23.2%)^c	<0.01
Age stratified
<50 years	57/150 (38.0%)^a	136/220 (61.8%)^b	284/1062 (26.7%)^c	<0.01
≥50 years	55/205 (26.8%)^a	71/164 (43.3%)^b	159/844 (18.8%)^c	<0.01
P value	0.03	<0.01	<0.01

Values were presented as number, %
Chi-square test was used and Bonferroni was used for post hoc tests
Abbreviations: PTC Papillary thyroid carcinoma
Values labeled without a common superscript letter differ from each other in the same row, P <0.05

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