Exploring prognostic potential of long noncoding RNAs in colorectal cancer based on a competing endogenous RNA network

Table 1 Sequences of primers used for polymerase chain reaction

Gene	Sequence
LINC00488	Forward: 5’ – GTTCACGGTGCTTCCTCAGA - 3’
	Reverse: 5’ – GGGCGACAGAACAAGACTCA - 3’
GAPDH	Forward: 5’ – GCACCGTCAAGGCTGAGAAC - 3’
	Reverse: 5’ – TGGTGAAGACGCCAGTGGA - 3’

Table 2 Clinical and pathological characteristics of 506 colorectal cancer patients

Characteristic	Number of cases	Risk		P value
		Low (n = 253)	High (n = 253)
Age (yr)				0.057
≤ 60	163	71	92
> 60	343	182	161
Gender
Female	230	112	118	0.655
Male	276	141	135
Stage
Stage I + II	285	238	47	< 0.011
Stage III + IV	221	15	206
Tumor invasion depth
T1 + T2	105	85	20	< 0.011
T3 + T4	401	168	233
Lymph node metastasis
N0	295	238	57	< 0.011
N1 + N2	211	15	196
Distant metastasis
M0	384	253	131	< 0.011
M1 + M2	122	0	122

¹Statistically significant results.