Table 4. The hazard ratio (HR) for various cancers among shipbreaking workers with different job titles, 1985–2008 a .
| Cancer site (ICD-O-3) | Flame cutters (n = 2609) | Lifters (n = 758) | Odd-jobbers (n = 866) | Supervisors (n = 42) | Others (n = 152) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | HR (95% CI) | N | HR (95% CI) | N | HR (95% CI) | N | HR (95% CI) | N | HR (95% CI) | |
| All cancer | 241 | 1.68(1.45–1.94) | 76 | 1.67 (1.29–2.16) | 89 | 1.46 (1.16–1.85) | 7 | 2.81 (1.14–6.95) | 23 | 1.79 (1.11–2.87) |
| Oral cavity | 50 | 2.40 (1.71–3.36) | 21 | 2.93 (1.72–5.01) | 6 | 2.10 (0.83–5.33) | # | 2.26 (0.22–22.9) | 4 | 2.13 (0.66–6.88) |
| Nasopharynx | 19 | 2.24 (1.30–3.86) | 3 | 1.37 (0.38–4.86) | 3 | 2.20 (0.57–8.45) | - | # | 4.34 (0.61–30.8) | |
| Esophagus | 13 | 1.91 (1.00–3.64) | 3 | 1.68 (0.45–6.21) | - | - | - | |||
| Stomach | 15 | 2.01 (1.10–3.66) | 3 | 1.63 (0.44–6.02) | # | 0.65 (0.08–5.20) | - | - | ||
| Colon | 6 | 0.72 (0.31–1.70) | 4 | 1.18 (0.40–3.51) | 8 | 3.07 (1.29–7.29) | # | 10.92 (0.44–272.3) | # | 1.21 (0.14–10.6) |
| Liver and intrahepatic bile ducts | 53 | 1.55 (1.14–2.12) | 8 | 0.99 (0.47–2.11) | 9 | 1.57 (0.75–3.30) | # | 8.67 (0.40–190.4) | 4 | 1.51 (0.50–4.56) |
| Trachea, bronchus, and lung | 31 | 3.15 (2.01–4.92) | 12 | 2.79 (1.38–5.65) | 10 | 1.47 (0.73–2.95) | # | 11.12 (1.18–105.2) | 6 | 5.48 (1.76–17.1) |
| Mesotheliomas | # | 8.98 (0.55–145) | ||||||||
| Thymus, heart and mediastium | # | 8.46 (1.14–62.6) |
a. Adjusted for premium ratable wage per month;
Bold italic, statistically significant;
#The number of cancer cases less than 2.