Studies | Ethnicity (n) | Studies (n) | Combined RR (95 % CI) | P(Z) | I2 | P(Q) |
---|---|---|---|---|---|---|
NSCLC vs. Control | All | 19 | 7.16(4.63-11.07) | <0.001 | 58.1Â % | 0.001 |
 | Asians | 18 | 6.60(4.33-10.05) | <0.001 | 55..4 % | 0.002 |
 | Caucasians | 1 | 101(6.34-1608) | 0.001 | / | / |
Squamous cell carcinoma vs. Adenocarcinoma | All | 22 | 1.00(0.93, 1.07) | 0.983 | 7.0Â % | 0.367 |
 | Asians | 19 | 0.97(0.90-1.05) | 0.44 | 0 % | 0.189 |
 | Caucasians | 3 | 1.01(0.78-1.30) | 0.959 | 40.0 % | 0.515 |
Well/Moderately differentiated vs. Poor differentiated | All | 21 | 0.80(0.73-0.87) | <0.001 | 45.4Â % | 0.013 |
 | Asians | 20 | 0.78(0.72-0.86) | <0.001 | 33 % | 0.077 |
 | Caucasians | 1 | 0.96(0.86-1.08) | 0.487 | / | / |
TNMI/II stage vs. TNM III/IVstage | All | 26 | 0.75(0.67-0.84) | <0.001 | 72.7Â % | <0.001 |
 | Asians | 22 | 0.74(0.65-0.84) | <0.001 | 71.4 % | <0.001 |
 | Caucasians | 4 | 0.89(0.75-1.07) | 0.222 | 39 % | 0.178 |
Lymph node metastasis vs. Non lymph node metastasis | All | 25 | 1.14(1.01-1.29) | 0.035 | 71.5Â % | <0.001 |
 | Asians | 22 | 1.16(1.01-1.34) | 0.037 | 72.7 % | <0.001 |
 | Caucasians | 3 | 1.03(0.80-1.32) | 0.839 | 64.2 % | 0.061 |
Small Tumor vs. Big Tumor | All | 11 | 0.95(0.86-1.05) | 0.336 | 18.1Â % | 0.272 |
 | Asians | 9 | 0.98(0.85-1.13) | 0.796 | 31 % | 0.171 |
 | Caucasians | 2 | 0.90(0.78-1.04) | 0.161 | 0 % | 0.729 |