Workplace type | Person-years | O/E | SIR | 95% CI |
---|---|---|---|---|
Refinery | 69795 | 10/8.1 | 1.24 | 0.59 to 2.27 |
Terminal | 73373 | 14/8.6 | 1.63 | 0.89 to 2.73 |
Airport | 6877 | 1/0.8 | 1.24 | 0.03 to 6.92 |
Onshore production | 19629 | 1/1.5 | 0.66 | 0.02 to 3.67 |
Offshore production | 6924 | 1/0.5 | 2.15 | 0.05 to 11.97 |
Period of hire | Person-years | Cases | RIR* | 95% CI |
---|---|---|---|---|
Post-1975 | 79838 | 7 | 1 | |
1965–74 | 60283 | 8 | 1.11 | 0.36 to 3.39 |
1955–64 | 24837 | 5 | 1.51 | 0.34 to 6.69 |
Pre-1954 | 11640 | 7 | 4.03 | 0.81 to 20.1 |
Years of employment | Person-years | Cases | RIR† | 95% CI |
---|---|---|---|---|
5–9 | 45836 | 4 | 1 | |
10–15 | 43718 | 5 | 1.14 | 0.30 to 4.41 |
15–19 | 32976 | 4 | 1.08 | 0.24 to 4.82 |
20–24 | 21475 | 4 | 1.53 | 0.32 to 7.32 |
25+ | 32593 | 10 | 1.97 | 0.43 to 9.13 |
Years since hire | Person-years | Cases | RIR‡ | 95% CI |
---|---|---|---|---|
5–9 | 37624 | 4 | 1 | |
10–14 | 41147 | 3 | 0.63 | 0.14 to 2.89 |
15–19 | 34372 | 3 | 0.69 | 0.14 to 3.51 |
20–24 | 23741 | 7 | 2.14 | 0.48 to 9.55 |
25+ | 39714 | 10 | 1.33 | 0.26 to 6.88 |
Highest hydrocarbon ranking job | Person-years | Cases | RIR§ | 95% CI |
---|---|---|---|---|
1 | 33991 | 1 | 1 | |
2 | 14986 | 1 | 3.17 | 0.19 to 51.9 |
3 | 1912 | 0 | 0 | |
4 | 80583 | 16 | 7.14 | 0.94 to 54.1 |
5 | 6430 | 1 | 6.65 | 0.41 to 106.7 |
6 | 28420 | 6 | 6.9 | 0.82 to 58.0 |
7 | 10252 | 2 | 7 | 0.63 to 77.9 |
Hydrocarbon ranking longest job | Person-years | Cases | RIR¶ | 95% CI |
---|---|---|---|---|
Tests for trend—*p = 0.09, †p = 0.34, ‡p = 0.37, §p = 0.05, ¶p = 0.07 | ||||
1 | 45922 | 2 | 1 | |
2 | 15856 | 1 | 1.79 | 0.16 to 20.1 |
3 | 2959 | 0 | 0 | |
4 | 74258 | 17 | 4.93 | 1.14 to 21.4 |
5 | 4723 | 1 | 5.11 | 0.46 to 56.4 |
6 | 25187 | 6 | 4.63 | 0.93 to 23.2 |
7 | 5011 | 0 | 0 |