From: IGF-I and IGFBP-3 and the risk of lung cancer: A meta-analysis based on nested case-control studies
Serum factors | References | Cases | Cases | ||||
---|---|---|---|---|---|---|---|
 |  | N1 | Mean(ng/ml) | SD(ng/ml) | N2 | Mean(ng/ml) | SD(ng/ml) |
IGF-1 | [14] | 93 | --- | --- | 186 | --- | --- |
 | [15] | 230 | 123 | 46.43 | 740 | 127 | 41.62 |
 | [16] | 159 | 158 | 56 | 297 | 153 | 54 |
 | [17] | 194 | 124 | 54 | 9351 | 126 | 57 |
 | [18] | 200 | 137.2 | 52.3 | 400 | 145.5 | 52 |
 | [19] | 167 | --- | --- | 498 | --- | --- |
IGFBP-3 | [14] | 93 | --- | --- | 186 | --- | --- |
 | [15] | 230 | 1793 | 487.43 | 740 | 1863 | 458.76 |
 | [16] | 159 | 30700 | 8200 | 297 | 29400 | 7900 |
 | [17] | 194 | 2780 | 860 | 9351 | 2990 | 810 |
 | [18] | 200 | 2228 | 650 | 400 | 2369 | 640 |
 | [19] | 167 | --- | --- | 498 | --- | --- |