Analyzed results | Control | Thyroid cancer | Thyroid cancer without 131I treatment | Thyroid cancer with 131I treatment |
No. of breast cancer | 368 | 129 | 38 | 91 |
Person-years | 280,940 | 69,554 | 21,439 | 48,115 |
Incidence rates | 13.1 | 18.6 | 17.7 | 18.9 |
Crude HR (95% CI) | 1.00 | 1.41 (1.16–1.73) | 1.35 (0.97–1.89) | 1.44 (1.15–1.81) |
Adjusted HR (95% CI) | 1.00 | 1.31 (1.07–1.61) | 1.26 (0.90–1.76) | 1.34 (1.06–1.69) |
Crude HR (98% CI) | 1.00 | 1.41 (1.11–1.81) | 1.35 (0.90–2.03) | 1.44 (1.09–1.91) |
Adjusted HR (98% CI) | 1.00 | 1.31 (1.02–1.68) | 1.26 (0.84–1.89) | 1.34 (1.01–1.78) |
Adjusted for age, all comorbidities, hormone therapy, mammography, and ultrasonography.