Incidence rate ratios for job titles, comparing rate for each job title with population rate (2.26 cases per 100 person-years, 95% CI 1.61 to 2.90). As job titles are reported each year of follow up and may change over period of employment, rates for job titles are based on person-years from actual questionnaires, without imputations for missing data
| Job title | Cases | Number of workers* | % (of total) person-time | Mean entry age† (range) | Rate ratios (95% CI) |
|---|---|---|---|---|---|
| *Not mutually exclusive. | |||||
| †Age at entering job category. | |||||
| Animal care specialist | 12 | 75 | 9.0 | 32.1 (18–59) | 3.96 (2.15–7.28) |
| Associate scientist | 8 | 100 | 7.6 | 33.1 (18–56) | 3.16 (1.53–6.52) |
| Assistant scientist | 2 | 29 | 2.0 | 30.6 (22–48) | 2.95 (0.75–11.58) |
| Supervisory | 10 | 112 | 17.8 | 38.4 (25–61) | 1.69 (0.86–3.30) |
| Support staff | 1 | 26 | 2.0 | 36.6 (22–53) | 1.47 0.21–10.33) |
| Animal health | 2 | 17 | 4.4 | 34.5 (23–51) | 1.36 (0.34–5.48) |
| Toxicology | 3 | 45 | 8.0 | 36.2 (18–61) | 1.12 (0.35–3.56) |
| Scientist | 8 | 254 | 41.9 | 37.3 (24–62) | 0.58 (0.27–1.21) |
| Lab technician | 1 | 68 | 7.0 | 37.9 (18–63) | 0.43 (0.06–3.08) |