Table 4.
Subgroups | No. of studies | No. of patients | Effects model | HR (95%CI) | p | Heterogeneity I2(%) Ph |
|
---|---|---|---|---|---|---|---|
Total | 4 | 796 | Fixed | 1.93(1.45–2.56) | < 0.001 | 45.6 | 0.138 |
Country | |||||||
China | 3 | 694 | Fixed | 2.21(1.63–3.01) | < 0.001 | 0 | 0.917 |
Japan | 1 | 102 | - | 0.85(0.40–1.80) | 0.672 | - | - |
Sample size | |||||||
< 150 | 2 | 215 | Random | 1.48(0.51–4.27) | 0.468 | 77.5 | 0.035 |
≥ 150 | 2 | 581 | Fixed | 2.14(1.51–3.02) | < 0.001 | 0 | 0.967 |
Cancer type | |||||||
HNC/HNSCC | 1 | 102 | - | 0.85(0.40–1.80) | 0.672 | - | - |
HPC | 1 | 113 | - | 2.51(1.28–4.92) | 0.007 | - | - |
LC | 2 | 581 | Fixed | 2.14(1.51–3.02) | < 0.001 | 0 | 0.967 |
TNM stage | |||||||
I-IV | 2 | 581 | Fixed | 2.14(1.51–3.02) | < 0.001 | 0 | 0.967 |
Recurrent/ Metastatic/ III-IV |
2 | 215 | Random | 1.48(0.51–4.27) | 0.468 | 77.5 | 0.035 |
Treatment | |||||||
Surgery | 2 | 581 | Fixed | 2.14(1.51–3.02) | < 0.001 | 0 | 0.967 |
Mixed | 1 | 113 | - | 2.51(1.28–4.92) | 0.007 | - | - |
ICIs | 1 | 102 | - | 0.85(0.40–1.80) | 0.672 | - | - |
Cut-off value | |||||||
≥ 4 | 1 | 427 | - | 2.13(1.39–3.26) | 0.001 | - | - |
≥ 3 | 2 | 215 | Random | 1.48(0.51–4.27) | 0.468 | 77.5 | 0.035 |
≥ 2 | 1 | 154 | - | 2.16(1.19–3.91) | 0.011 | - | - |
Survival analysis | |||||||
Univariate | 1 | 427 | - | 2.13(1.39–3.26) | 0.001 | - | - |
Multivariate | 3 | 369 | Random | 1.71(0.92–3.18) | 0.089 | 61.1 | 0.077 |
TNM: tumor (T), node (N), metastasis (M); HNC: head and neck cancer; LC: laryngeal cancer; HPC: hypopharyngeal cancer; HNSCC: head and neck squamous cell carcinoma; ICIs: immune checkpoint inhibitors; DFS: disease-free survival