Table 7. Multivariate proportional hazard models.

	Persistent growth	Progression free survival	GR hearing preservation	GR hearing preservation
Variable	p Value	p Value	p Value	p Value
Age	> 0.99	0.70	0.53	0.94
Volume	> 0.99	0.73	0.96	0.72
Expansion			0.53	0.62
Mean cochlear dose			0.03
Maximum cochlear dose				0.017

Abbreviations: GR, Gardner–Robertson.

Note: The independent variables are shown in columns and dependent values are shown in rows.