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Table 4 The result of meta-regression

From: Occupational benzene exposure and the risk of genetic damage: a systematic review and meta-analysis

Genetic damage indicators Coef P 95%CI
CA frequency
 Year of publication (year< 2000 vs. year> = 2000) 0.053 0.863 −0.593-0.699
 Geographical region (Eastern vs. Western) −0.321 0.279 −0.931-0.288
 Exposure factor (Benzene vs. Mixed benzene) 0.772 0.005 0.276–1.267
TL
 Year of publication (year< 2000 vs. year> = 2000) 1.094 0.519 −2.551-4.740
 Geographical region (Eastern vs. Western) −1.483 0.117 −3.407-0.441
 Exposure factor (Benzene vs. Mixed benzene) 2.573 0.004 1.011–4.136
SCE frequency
 Year of publication (year< 2000 vs. year> = 2000) −0.494 0.341 −1.552-0.564
 Geographical region (Eastern vs. Western) −1.463 0.001 −2.257- -0.669
 Exposure factor (Benzene vs. Mixed benzene) −0.502 0.306 −1.501-0.497
MN frequency
 Year of publication (year< 2000 vs. year> = 2000) −0.624 0.132 −1.442-0.195
 Geographical region (Eastern vs. Western) −0.949 0.087 −0.204-0.144
 Exposure factor (Benzene vs. Mixed benzene) 0.285 0.515 −0.973-0.709