Table 3.
Population-based Studies of Occupational Risk for Chronic Bronchitis
| First Author, Year, Location (Reference) | Study Type and Population | Total (N) | Cases (n) | Exposure | PAF (%) |
|---|---|---|---|---|---|
| Montnémery, 2001, Sweden (61) | Population based | 8,469 | 390 | Self-reported | 11.0 |
| Lange, 2003, Denmark (62) | Population based | 3,736 | 602 | Self-reported | 16.0 |
| Sunyer, 2005, international (39) | Population based (longitudinal), males | 3,951 | 273 | VGDF by JEM | 15.0 |
| Sunyer, 2005, international (39) | Population based (longitudinal), females | 4,312 | 250 | VGDF by JEM | 0.0 |
| Jaén, 2006, Spain (40) | Population based | 576 | 69 | Self-reported | 29.4 |
| Doney, 2014, USA (51) | Population based | 3,508 | 280 | Self-reported (severe exposure) | 23.1 |
| Hansell, 2014, New Zealand (50) | Population based | 1,017 | 86 | JEM (high exposure) | 13.1 |
| Axelsson, 2016, Sweden (63) | Population based | 1,172 | 84 | Self-reported | 8.6 |
Definition of abbreviations: JEM = job exposure matrix; PAF = population attributable fraction; USA = United States; VGDF = vapors, gas, dust, or fumes.
The pooled PAF for the occupational contribution to chronic bronchitis was 13% (95% confidence interval, 6–21%).