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

Table 1 Basic characteristics

	Macrocalcification (355)	Microcalcification (384)	Non-calcification (1906)	P value
Gender (male, %)	68 (19.2%)	94 (24.5%)	399 (20.9)	0.18
Age (mean ± SE)	51.4±0.23^a	46.0±0.60^b	47.5±0.27^b	<0.01^*
TBSRTC				<0.01
Unreported	2 (0.6%)^a	1 (0.3%)^a	13 (0.7%)^a
I/III/IV	53 (14.9%)^a	33 (8.6%)^b	130 (6.8%)^b
II/V/VI	300 (84.5%)^a	350 (91.1%)^b	1763 (92.5%)^b

Unless additionally described, values were presented as number, %
Abbreviations: SE Standard error, TBSRTC The Bethesda System for Reporting Thyroid Cytopathology
^*One-way ANOVA, otherwise chi-square test was used
Values labeled without a common superscript letter differ from each other in the same row, P <0.05

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