Percentage distributions and average annual incidence rates of work aggravated and new onset asthma cases by primary industry
| Industry | WAA (n = 210) | NOA (n = 891) | All | ||
|---|---|---|---|---|---|
| % | Rate† | % | Rate‡ | Rate§ | |
| †Average annual rate per 100 000 workers with current asthma per year. | |||||
| ‡Average annual rate per 100 000 workers without current asthma per year. | |||||
| §Average annual rate per 100 000 workers per year, irrespective of asthma status. | |||||
| ¶Rate based on less than five cases. | |||||
| *p<0.05, **p<0.01, by χ2 test. | |||||
| Services** | 40% | 4.3 | 29% | 1.1 | 1.4 |
| Manufacturing** | 22% | 5.0 | 46% | 3.2 | 3.3 |
| Public administration* | 16% | 14.2 | 10% | 2.9 | 3.7 |
| Wholesale/retail trade** | 9% | 1.7 | 3% | 0.2 | 0.3 |
| Transportation, communication, and other public utilities | 7% | 4.2 | 4% | 0.7 | 1.0 |
| Finance, insurance, and real estate | 2% | 1.2 | 1% | 0.2 | 0.2 |
| Construction | 2% | 1.4¶ | 4% | 0.7 | 0.8 |
| Agriculture | 1% | 2.7¶ | 3% | 1.4 | 1.5 |
| Mining | 0.5% | 9.6¶ | <1% | 0.6¶ | 1.1¶ |
| Unclassified | 0.5% | – | <1% | – | – |
| Overall | 100% | 3.9 | 100% | 1.3 | 1.5 |