Subjects | Current smokers (%) | Schooling >10 y (%) | Atopy (%) | Mean height (cm) | Mean age (y) | |
Refineries: | ||||||
Refinery 1 | 927 | 22 | 47 | 42 | 176.6 | 41.3 |
Refinery 2 | 1005 | 23 | 48 | 50 | 176.9 | 39.6 |
Refinery 3 | 456 | 27 | 51 | 37 | 177.1 | 37.3 |
p Value2-150 | 0.07 | 0.41 | <0.001 | 0.31 | <0.001 | |
Process groups: | ||||||
Office or administration | 519 | 15 | 72 | 48 | 177.5 | 41.5 |
Powerhouse | 106 | 19 | 39 | 34 | 175.3 | 45.9 |
Maintenance | 897 | 25 | 42 | 47 | 176.6 | 38.2 |
Digestion | 205 | 30 | 39 | 40 | 176.8 | 39.3 |
Clarification | 202 | 33 | 45 | 37 | 177.0 | 39.8 |
Precipitation | 152 | 24 | 41 | 43 | 177.4 | 39.6 |
Calcination or shipping | 186 | 23 | 41 | 43 | 176.9 | 40.8 |
Residue | 39 | 21 | 36 | 49 | 176.7 | 43.7 |
Descale | 82 | 32 | 39 | 40 | 176.4 | 36.6 |
p Value2-150 | <0.001 | <0.001 | 0.02 | 0.11 | <0.001 |
↵2-150 χ2 Test for difference in proportions orF test for difference in means between groups.