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Table 3 Results of subgroup analyses on prognostic effects of CRC patients

From: Log odds of positive lymph nodes as a novel prognostic predictor for colorectal cancer: a systematic review and meta-analysis

Comparisons (vs LODDS0)

OS

DFS

No. of studies

HR (95% CI)

Heterogeneity

No. of studies

HR (95% CI)

Heterogeneity

I2 (%)

I2 (%)

TOTAL studies

 LODDS1

9

1.77 (1.38, 2.28)

18.3

4

1.82 (1.23, 2.68)

35

 LODDS2

9

3.49 (2.88, 4.23)

0

3

4.53 (3.14, 6.55)

0

Yearc

  > Median

  LODDS1

4

1.53 (1.07, 2.21)

25.9

1

2.73 (1.72, 4.34)

  LODDS2

4

3.51 (2.59, 4.76)

0

1

4.56 (2.91, 7.16)

  ≤ Median

  LODDS1

5

2.06 (1.46, 2.92)

7.1

3

1.44 (0.99, 2.09)

0

  LODDS2

5

3.62 (2.56, 5.11)

36.4

2

4.48 (2.36, 8.47)

0

Country

 East Asia

  LODDS1

2

2.41 (1.27, 4.57)

0

2

1.94 (0.97, 3.86)

74.6

  LODDS2

2

3.65 (2.37, 5.62)

0

1

4.56 (2.91, 7.16)

 non-East Asia

  LODDS1

7

1.69 (1.27, 4.57)

26.4

2

1.54 (0.89, 2.67)

0

  LODDS2

7

3.47 (2.78, 4.34)

4.9

2

4.48 (2.36, 8.47)

0

Type of cancer

 colorectal cancer

  LODDS1

3

2.21 (1.45, 3.37)

0

1

1.54 (0.89, 2.67)

  LODDS2

3

3.48 (2.51, 4.84)

0

1

4.56 (2.91, 7.16)

 colon cancer

  LODDS1

5

1.68 (1.14, 2.46)

42.8

2

2.73 (1.72, 4.34)

0

  LODDS2

5

3.79 (2.79, 5.15)

31

2

4.48 (2.36, 8.47)

0

 rectal cancer

  LODDS1

1

1.14 (0.44, 2.98)

1

1.35 (0.80, 2.26)

  LODDS2

1

2.47 (1.17, 5.22)

  1. Abbreviations: CRC Colorectal cancer, HR Hazard ratio, OS Overall survival, DFS Disease-free survival, LODDS Log odds of positive lymph nodes
  2. “-”: not available
  3. aP-value for estimates of HR
  4. bP-value for heterogeneity
  5. cThe median year of OS, and DFS was 2017, and 2018, respectively