Research Article
Environmental Exposure to Emissions from Petrochemical Sites and Lung Cancer: The Lower Mississippi Interagency Cancer Study
Table 1
Demographic and smoking characteristics of the LMRICS study population1.
| | Descriptor | Total study population | Cases | Controls |
| | Number | 892 | 455 | 437 | | Age (mean, in years) | 60.0 (10.2) | 60.4 (9.2) | 59.6 (11.1) | | Male (%) | 64.5 | 65.3 | 63.6 | | Black (%) | 35.3 | 36.0 | 34.6 | | High school graduate or higher (%) | 75.0 | 66.2 | 84.2 | | Residences (1970–99)—total number (mean) | 2.98 (2.41) | 2.89 (2.33) | 3.07 (2.48) | | Residences—total number geocodable (mean) | 2.91 (2.35) | 2.82 (2.26) | 3.01 (2.41) | | Current smokers (%) | 44.4 | 64.6 | 23.3 | | Smoking-years (mean) | 26.9 (18.7) | 36.1 (14.4) | 17.4 (17.9) | | Cig/day while smoking (mean) | 21.6 (21.6) | 28.6 (17.6) | 14.3 (17.9) |
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1Means are presented followed by standard deviations in parentheses as appropriate.
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