Table III.

Hazard ratios for survival via PET and CT response.

Comparison	Evaluable patients, unadjusted		Evaluable patients, FLIPI-adjusted		Propensity score-matched patients
	OS HR (95% CI)	PFS HR (95% CI)	OS HR (95% CI)	PFS HR (95% CI)	OS HR (95% CI)	PFS HR (95% CI)
CT-negative	Ref	Ref	Ref	Ref	Ref	Ref
CT-positive	1.61 (1.13, 2.29)	1.45 (1.12, 1.89)	1.38 (0.96, 1.97)	1.34 (1.03, 1.75)	1.76 (1.15, 2.69)	1.32 (0.96, 1.82)
PET-negative	Ref	Ref	Ref	Ref	Ref	Ref
PET-positive	1.78 (1.16, 2.72)	1.63 (1.21, 2.20)	1.54 (1.01, 2.36)	1.54 (1.14, 2.07)	1.94 (1.22, 3.08)	1.48 (1.06, 2.07)
CT-negative					Ref	Ref
PET-negative	–	–	–	–	0.80 (0.49, 1.31)	0.99 (0.71, 1.38)
CT-positive	–	–	–	–	Ref	Ref
PET-positive					0.88 (0.58, 1.35)	1.10 (0.78, 1.55)

CI, confidence interval; CT, computed tomography; FLIPI, Follicular Lymphoma International Prognostic Index; HR, hazard ratio; OS, overall survival; PET, positron emission tomography; PFS, progression-free survival; Ref, reference