The effect of primary tumor radiotherapy in patients with Unresectable stage IV Rectal or Rectosigmoid Cancer: a propensity score matching analysis for survival

Table 1 Comparison of clinical and treatment characteristics between the patients with primary tumor radiation and those without

Variable	Primary tumor radiotherapy				P-value
Variable	No (187)		Yes (163)		P-value
	Number	%	Number	%
Age					0.460
< 60 years	90	48.13	72	44.17
≥ 60 years	97	51.87	91	55.83
Sex					0.879
Male	136	72.73	118	72.39
Female	51	27.27	45	27.61
KPS^a					0.037
70–80	120	64.17	122	74.85
90–100	67	35.83	41	25.15
Primary Site					0.056
Rectum	134	71.66	132	80.98
Rectosigmoid	53	28.34	31	19.02
T Stage					0.043
T2	10	5.35	14	8.59
T3	86	45.99	90	55.21
T4	91	48.66	59	36.20
N Stage					< 0.001
N0	10	5.35	40	24.54
N1	43	22.99	71	43.56
N2	44	23.53	42	25.77
N+	77	41.18	9	5.52
Nx	13	6.95	1	0.61
M Stage					0.880
M1a	98	52.41	82	50.31
M1b	77	41.17	69	42.33
M1c	12	6.42	12	7.36
Differentiation					0.013
Well	20	10.70	8	4.91
Moderate	94	50.27	104	63.80
Poor	61	32.62	49	30.06
Unknown	12	6.42	2	1.23
Chemotherapy Cycle					0.019
4–8 cycles	142	75.94	105	64.42
9–12 cycles	45	24.06	58	35.58
Second-line Chemotherapy					0.014
No	156	83.42	120	73.62
Yes	31	16.58	43	26.38
Chemotherapy Response					0.279
Poor	83	44.39	63	38.65
Good	104	55.61	100	61.35
Metastatic Tumor Radiotherapy					0.201
Yes	90	48.13	90	55.21
No	97	51.87	73	44.79

ISSN: 1748-717X