Table 2 Standardized incidence ratios and relative risks for thyroid cancer by occupational history and sex among South Korean medical radiation workers, 1996–2015
From: Thyroid cancer risks among medical radiation workers in South Korea, 1996–2015
Male | Female | |||||
|---|---|---|---|---|---|---|
Cases | SIR (95% CI) | RRa (95% CI) | Cases | SIR (95% CI) | RRa (95% CI) | |
Total | 309 | 1.72 (1.53, 1.91) | – | 518 | 1.18 (1.08, 1.28) | – |
Job title | ||||||
Radiologic technologist | 91 | 1.73 (1.37, 2.08) | Ref (1.00) | 141 | 1.60 (1.34, 1.87) | Ref (1.00) |
Radiologist | 11 | 2.33 (0.95, 3.71) | 1.42 (0.75, 2.69) | 10 | 1.07 (0.41, 1.73) | 0.63 (0.33, 1.22) |
Dentist | 68 | 1.60 (1.22, 1.98) | 1.06 (0.76, 1.47) | 51 | 1.05 (0.76, 1.34) | 0.65 (0.47, 0.91) |
Dental hygienist | 0 | – | – | 101 | 0.88 (0.71, 1.05) | 0.59 (0.45, 0.76) |
Nurse | 2 | 2.24 (−, 5.35) | 1.34 (0.33, 5.44) | 80 | 1.17 (0.91, 1.43) | 0.77 (0.58, 1.01) |
Doctor | 97 | 1.73 (1.38, 2.07) | 1.11 (0.81, 1.51) | 53 | 1.48 (1.08, 1.88) | 0.93 (0.67, 1.30) |
Others | 40 | 1.79 (1.23, 2.34) | 0.98 (0.67, 1.43) | 82 | 1.11 (0.87, 1.35) | 0.69 (0.52, 0.91) |
Type of medical facility | ||||||
Hospital | 101 | 1.81 (1.46, 2.16) | Ref (1.00) | 190 | 1.42 (1.21, 1.62) | Ref (1.00) |
Clinic | 118 | 1.72 (1.41, 2.02) | 1.01 (0.77, 1.34) | 111 | 1.30 (1.06, 1.54) | 0.91 (0.72, 1.15) |
Others | 90 | 1.65 (1.31, 1.98) | 1.02 (0.76, 1.37) | 217 | 0.99 (0.86, 1.12) | 0.72 (0.59, 0.87) |
Year of birth | ||||||
< 1960 | 68 | 1.88 (1.43, 2.32) | 1.25 (0.46, 3.35) | 26 | 1.45 (0.89, 2.01) | 2.01 (0.89, 4.56) |
1960–1969 | 131 | 1.77 (1.47, 2.08) | 1.17 (0.54, 2.51) | 128 | 1.25 (1.03, 1.47) | 1.10 (0.66, 1.84) |
1970–1979 | 77 | 1.36 (1.06, 1.66) | 0.94 (0.53, 1.68) | 244 | 1.17 (1.03, 1.32) | 1.15 (0.83, 1.60) |
≥ 1980 | 33 | 2.60 (1.71, 3.49) | Ref (1.00) | 120 | 1.09 (0.89, 1.28) | Ref (1.00) |
Year of entry | ||||||
1996–1999 | 126 | 1.85 (1.53, 2.18) | 0.93 (0.69, 1.24) | 154 | 1.32 (1.11, 1.53) | 1.11 (0.87, 1.41) |
2000–2004 | 77 | 1.42 (1.10, 1.73) | 0.73 (0.54, 0.98) | 162 | 1.19 (1.01, 1.37) | 1.06 (0.86, 1.32) |
2005–2011 | 106 | 1.86 (1.50, 2.21) | Ref (1.00) | 202 | 1.09 (0.94, 1.24) | Ref (1.00) |
Age at baseline, years | ||||||
< 25 | 18 | 1.75 (0.94, 2.56) | Ref (1.00) | 149 | 1.15 (0.97, 1.34) | Ref (1.00) |
25–29 | 70 | 1.69 (1.30, 2.09) | 1.66 (0.90, 3.05) | 157 | 1.19 (1.00, 1.38) | 1.10 (0.86, 1.40) |
30–39 | 136 | 1.73 (1.44, 2.02) | 2.06 (1.06, 4.00) | 159 | 1.17 (0.99, 1.35) | 1.00 (0.75, 1.35) |
≥ 40 | 85 | 1.73 (1.36, 2.10) | 1.90 (0.90, 4.02) | 53 | 1.30 (0.95, 1.64) | 1.20 (0.77, 1.88) |
Duration of employment, years | ||||||
< 1 | 18 | 1.36 (0.73, 1.99) | Ref (1.00) | 72 | 1.19 (0.92, 1.47) | Ref (1.00) |
1–4 | 90 | 1.90 (1.51, 2.29) | 1.41 (0.85, 2.35) | 204 | 1.08 (0.93, 1.22) | 0.90 (0.69, 1.18) |
5–9 | 81 | 1.58 (1.23, 1.92) | 1.15 (0.68, 1.93) | 129 | 1.17 (0.97, 1.37) | 0.94 (0.70, 1.26) |
≥ 10 | 120 | 1.78 (1.46, 2.10) | 1.25 (0.75, 2.10) | 113 | 1.44 (1.18, 1.71) | 1.11 (0.81, 1.53) |