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Table 3: Final results of the multivariate analysis regarding local control
Variable Score Regression Coefficent Hazard Ratio 95% CI P value
Primary tumor volume 0 = 0–4 cm³; 1 = >4 cm³ 1.13 3.1 1.4–7.1 .007
Subglottic extension 0 = no; 1 = yes 1.27 3.5 1.6–7.9 .002
Note:—CI indicates confidence interval.
Variable	Score	Regression Coefficent	Hazard Ratio	95% CI	P value
Primary tumor volume	0 = 0–4 cm³; 1 = >4 cm³	1.13	3.1	1.4–7.1	.007
Subglottic extension	0 = no; 1 = yes	1.27	3.5	1.6–7.9	.002