Table 1 Descriptive data of mortality and morbidity study by job and residence categories
From: Mortality and morbidity study of petrochemical employees in a polluted site
Tot. | Job category | Residence in Gela | |||||
|---|---|---|---|---|---|---|---|
White collars | Blue collars | Both a | Missing | Residents | Commuters | ||
MORTALITY STUDY | |||||||
N (%) | 5,627 | 1,178 (21) | 2,985 (53) | 1,072 (19) | 392 (7) | 2,393 (42.5) | 3,234 (57.5) |
Person years | 178,318 | 37,092 | 93,557 | 35,247 | 12,422 | 74,201 | 104,117 |
Age at hiring, mean (sd) | 26.3 (6) | 26.3 (5.6) | 26.1 (5.8) | 25 (3.9) | 31 (9.5) | 26.5 (6.3) | 26.1 (5.7) |
Age at the end of follow-up, median | 58.7 | 58 | 58.2 | 60.3 | 61.7 | 58.2 | 59.1 |
Time since first employment, median | 32.5 | 33 | 31.7 | 39.4 | 34.8 | 32 | 33.2 |
MORBIDITY STUDY | |||||||
N (%) | 5,431 | 1,141 (21) | 3,005 (55.4) | 1,005 (18.5) | 280 (5.1) | 2,419 (44.5) | 3,012 (55.5) |
Age at the start of follow-up, mean (sd) | 55 (10.8) | 56 (7.9) | 54 (11.7) | 56 (10.1) | 63 (9.5) | 53 (12.1) | 57 (9.4) |
Time since first employmentb, median | 33.7 | 34.3 | 32.6 | 40.6 | 37.4 | 32.6 | 34.9 |