Table 4. Incidence of and risk for Legionnaires’ disease by case-patient occupation, New York, New York, USA, 2002–2011.
| Occupational category | No. (%) working case-patients | % Total working population* | Mean crude annual disease incidence† | Crude relative risk (95% CI)‡ |
|---|---|---|---|---|
| Transportation | 49 (13.1) | 5.5 | 1.9 | 2.36 (1.82–3.06) |
| Repair | 14 (3.7) | 2.0 | 1.5 | 1.86 (1.11–3.11) |
| Protection | 20 (5.3) | 3.0 | 1.4 | 1.77 (1.15–2.71) |
| Cleaning | 27 (7.2) | 4.7 | 1.3 | 1.54 (1.07–2.22) |
| Construction | 26 (6.9) | 4.7 | 1.2 | 1.49 (1.03–2.16) |
| Service | 24 (6.4) | 5.0 | 1.0 | 1.28 (0.87–1.89) |
| Legal | 10 (2.7) | 2.1 | 1.0 | 1.27 (0.69–2.34) |
| Office | 59 (15.7) | 15.0 | 0.9 | 1.05 (0.83–1.33) |
| Entertainment | 17 (4.5) | 4.6 | 0.8 | 0.98 (0.61–1.55) |
| Production | 14 (3.7) | 3.8 | 0.8 | 0.99 (0.59–1.65) |
| Counsel | 7 (1.9) | 2.1 | 0.7 | 0.91 (0.43–1.89) |
| Finance | 8 (2.1) | 2.7 | 0.6 | 0.78 (0.39–1.55) |
| Medical | 12 (3.2) | 4.2 | 0.6 | 0.76 (0.43–1.32) |
| Food | 16 (4.3) | 5.3 | 0.7 | 0.80 (0.50–1.29) |
| Health | 10 (2.7) | 4.1 | 0.5 | 0.66 (0.36–1.21) |
| Sales | 27 (7.2) | 11.3 | 0.5 | 0.64 (0.44–0.92) |
| Engineering | 2 (0.5) | 0.9 | 0.5 | 0.58 (0.15–2.33) |
| Management | 11 (2.9) | 8.1 | 0.3 | 0.36 (0.20–0.65) |
| Education | 6 (1.6) | 5.9 | 0.2 | 0.27 (0.12–0.60) |
| Computer | 1 (0.3) | 2.0 | 0.1 | 0.13 (0.02–0.95) |
| Uncategorized/missing |
15 (4.0) |
0.0 |
NA |
|
| Total working | 375 (100.0) | 100.0 | 0.8 |
*Percentage of total city population working in occupational category (American Community Survey occupational survey). †Per 100,000 population, based on number of persons working in occupational category, according to 2005–2009 American Community Survey population data. ‡Comparison of risk for being in each occupational category for working case-patients versus the general working population.