Table 2.
Estimated odds ratios (ORs) and 95% confidence intervals (CIs) of accident involvement associated with drug violations in aviation employees by occupation, United States, 2003–2005.
| Occupation | Drug Violation |
Cases | Controls | OR | 95% CI | ||
|---|---|---|---|---|---|---|---|
| n | (%) | n | (%) | ||||
| Flight Crewmembers | Yes | 2 | (0.5) | 33 | (0.1) | 10.21 | 2.44–42.69 |
| No | 434 | (99.5) | 73,120 | (99.1) | |||
| Flight Attendants | Yes | 2 | (5.0) | 317 | (0.4) | 13.55 | 3.26–56.42 |
| No | 38 | (95.0) | 81,636 | (99.6) | |||
| Ground Security Coordinators | Yes | 5 | (4.0) | 119 | (0.6) | 6.83 | 2.74–17.02 |
| No | 120 | (96.0) | 19,518 | (99.4) | |||
| Aircraft Maintenance | Yes | 26 | (2.5) | 1,159 | (1.0) | 2.49 | 1.68–3.70 |
| No | 1,032 | (97.5) | 114,697 | (99.0) | |||
| Othera | Yes | 0 | (0.0) | 79 | (0.6) | b | b |
| No | 45 | (100.0) | 13,143 | (99.4) | |||
| Total | Yes | 35 | (2.1) | 1,707 | (0.6) | 3.40 c | 2.42–4.75 |
| No | 1,669 | (97.9) | 302,114 | (99.4) | |||
a
Including air traffic controllers, aviation screeners, flight instructors, and aircraft dispatchers.
b
Not estimable because none of the cases tested positive for drugs.
c
Based on the Mantel-Haenszel method and the logit estimator with a correction factor of 0.5 in every cell containing a zero.