Table 3. Logistic Regression for Outcome Complete Pathologic Response (Yes v. No).

		pCR		Univariate Logistic Regression
	N	N	% pCR	OR	95% CI	p-value
Interval from end of NCRT to Surgery
Interval in weeks (continuous)				1.20	1.01-1.42	0.038
Log transformation of Interval in weeks(continuous)				6.77	1.32-34.67	0.022
By interval quartiles
≤45 Days	24	3	12.5	1.00	Ref
46-50 Days	20	4	20.0	1.75	0.34-8.95	0.50
51-63 Days	22	5	22.7	2.06	0.43-9.87	0.37
64+ Days	22	9	40.9	4.85	1.11-21.26	0.036
By 3 week intervals
3-6 weeks (26-42 days)	17	2	11.8	1.00	Ref
6.1-9 weeks (43-63 days)	49	10	20.4	1.92	0.38-9.82	0.43
9.1-12 weeks (64-84 days)	16	6	37.5	4.50	0.75-26.93	0.099
>12 weeks (85+ days)	6	3	50.0	7.50	0.85-66.12	0.070
Other Characteristics
Age (continuous)				1.04	0.99-1.09	0.16
Gender
Female	13	2	15.4	1.00	Ref
Male	75	19	25.3	1.87	0.38-9.19	0.44
T Stage
T1/T2	8	2	25.0	1.00	Ref
T3/T4	80	19	23.8	0.93	0.17-5.02	0.94
N Stage
Positive	67	16	23.9	1.00		0.99
Negative	21	5	23.8	1.00	Ref
Mstage
M0	71	19	26.8	1.00	Ref
Any M1	17	2	11.8	0.37	0.08-1.75	0.21
Histology
Adenocarcinoma	74	16	21.6	1.00	Ref
Squamous Cell Carcinoma	14	5	35.7	2.01		0.26
Type of Chemotherapy
5FU-based	71	16	22.5	1.00	Ref
Taxol-based	17	5	29.4	1.43	0.44-4.67	0.55
Type of RT
3D-CRT	72	18	25.0	1.00	Ref
IMRT	16	3	18.8	0.69	0.18-2.71	0.60

NCRT: Neoadjuvant chemoradiation

3D-CRT: 3D-conformal radiotherapy

IMRT: intensity modulated radiotherapy