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Table 1 Univariate analysis of the influence of different NLN count on CSS in RC patients who received Pre-RT

From: Negative lymph node count is an independent prognostic factor for patients with rectal cancer who received preoperative radiotherapy

LNs

No.

5-year CCS

χ2

P value

LNs

No.

5-year CCS

χ2

P value

≤0

72

51.8%

41.745

0.000

≤12

3685

76.5%

42.763

0.000

>0

5996

79.5%

>12

2383

83.3%

≤1

230

63.5%

50.100

0.000

≤13

4022

76.9%

38.747

0.000

>1

5838

79.7%

>13

2046

83.6%

≤2

444

68.2%

44.132

0.000

≤14

4320

77.3%

33.939

0.000

>2

5624

80.0%

>14

1748

83.7%

≤3

720

69.0%

54.496

0.000

≤15

4585

77.3%

36.435

0.000

>3

5348

80.5%

>15

1483

84.8%

≤4

1015

70.0%

67.375

0.000

≤16

4822

77.6%

33.037

0.000

>4

5053

81.0%

>16

1246

85.3%

≤5

1314

71.8%

68.432

0.000

≤17

5013

72.8%

27.827

0.000

>5

4754

81.2%

>17

1055

85.4%

≤6

1625

72.5%

74.979

0.000

≤18

5177

78.0%

23.546

0.000

>6

4443

81.6%

>18

891

85.5%

≤7

1974

73.5%

74.302

0.000

≤19

5302

78.0%

25.448

0.000

>7

4094

81.9%

>19

766

86.8%

≤8

2285

74.2%

70.405

0.000

≤20

5422

78.2%

25.257

0.000

>8

3783

82.1%

>20

646

87.2%

≤9

2613

74.3%

78.060

0.000

≤21

5528

77.9%

21.120

0.000

>9

3455

82.8%

>21

540

87.5%

≤10

2973

75.0%

67.236

0.000

≤22

5606

78.4%

21.730

0.000

>10

3095

83.1%

>22

462

88.0%

≤11

3320

75.6%

57.663

0.000

≤23

5671

78.5%

18.872

0.000

>11

2748

83.4%

>23

397

88.8%