Table 3.

Cox proportional hazards analyses after dividing the cohort

Model	Dependent variable	Predictor	Total # of patients	HR (95% CI)	p-value
Univariate, known cohort	PFS	Broadband power	19	1.61 (0.67–3.84)	0.288
Univariate, new cohort	PFS	Broadband power	17	1.95 (0.85–4.48)	0.117

95% CI 95% confidence interval, HR hazard ratio, PFS progression-free survival