Table 2.

Prediction(p-value of Mann-Whitney rank-sum tests) of local control and disease-specific survival by absolute tumor volume (V₁, V₂, V₃, V₄) and regression ratio (V₂/V₁, V₃/V₁, V₄/V₁)for all patients and subgroups stratified by tumor stage and lymph node status.

Tumor Volume and Regression Ratio		V1	V2	V3	V4	V2/V1	V3/V1	V4/V1
All 80 patients	Local Control of Tumor	0.06	5×10−4	1×10−6	2×10−8	7×10−5	1×10−6	1×10−8
	Disease-Specific Survival	0.015	0.004	0.001	3×10−4	0.03	0.009	3×10−4
Patients Stratified by Tumor Stage
Stage I, II (42 pat.)	Local Control of Tumor	0.16	0.07	0.02	0.002	0.29	0.08	0.003
	Disease-Specific Survival	0.17	0.14	0.03	0.003	0.77	0.24	0.004
Stage III, IVA (38 pat.)	Local Control of Tumor	0.78	0.06	8×10−5	2×10−5	9×10−4	1×10−5	8×10−6
	Disease-Specific Survival	0.89	0.34	0.12	0.04	0.07	0.06	0.03
Patients Stratified by Lymph Node (LN) Status
LN negative (59 pat.)	Local Control of Tumor	0.17	0.008	8×10−5	2×10−5	0.0018	1×10−4	1×10−5
	Disease-Specific Survival	0.07	0.048	0.017	0.010	0.11	0.03	0.008
LN positive (21 pat.)	Local Control of Tumor	0.16	0.02	0.004	0.0004	0.013	0.004	0.0004
	Disease-Specific Survival	0.15	0.047	0.04	0.02	0.14	0.13	0.02