Table 5.

Effects of POC or its components on tumor size (greater than median).

	b (95% CI)	p-value	AIC a
Non-adjusted
POC	0.991 (0.983-0.998)	0.017	641.993
Sex	0.950 (0.608-1.484)	0.820	647.799
Age at exposure, years	1.039 (1.003-1.076)	0.032	643.192
Latency period, years	0.965 (0.932-0.999)	0.043	643.708
Age at operation, years	1.001 (0.978-1.025)	0.930	647.842
Thyroid dose, mGy (log)	0.896 (0.762-1.055)	0.188	646.086
	Model 1		644.147
Sex	0.917 (0.581-1.445)	0.708
Age at exposure, years	1.035 (0.993-1.078)	0.105
Latency period, years	0.961 (0.927-0.995)	0.027
Thyroid dose, mGy (log)	0.948 (0.781-1.151)	0.591
	Model 2		649.687
Sex	0.969 (0.618-1.520)	0.893
Age at operation, years	0.991 (0.965-1.019)	0.535
Thyroid dose, mGy (log)	0.872 (0.724-1.051)	0.152

^aAkaike information criterion.

Numbers in bold indicate statistical significance.