Table 6.
Associations of thyroid cancer with duration on dialysis prior to transplantation among kidney recipients
| Total thyroid cancer | Papillary carcinoma | Local | Regional/distant | |||||
|---|---|---|---|---|---|---|---|---|
| Cases | IRR (95%CI)a | xxx Cases | IRR (95%CI)a | txxx Cases | IRR (95%CI)a | xxx Cases | IRR (95%CI)a | |
| Duration on dialysis | ||||||||
| 0–<1 years | 62 | 1.00 (Ref) | 58 | 1.00 (Ref) | 45 | 1.00 (Ref) | 13 | 1.00 (Ref) |
| 1–<3 years | 79 | 1.31 (0.94–1.84) | 67 | 1.21 (0.84–1.72) | 56 | 1.28 (0.86–1.90) | 22 | 1.74 (0.87–3.48) |
| 3–<5 years | 39 | 1.44 (0.95–2.16) | 38 | 1.52 (1.00–2.31) | 32 | 1.59 (0.99–2.53) | 6 | 1.08 (0.41–2.89) |
| 5+ years | 54 | 1.92 (1.32–2.80) | 49 | 1.88 (1.27–2.79) | 29 | 1.36 (0.84–2.20) | 22 | 4.01 (1.98–8.11) |
| Unknown | 3 | 0.85 (0.26–2.72) | 3 | 0.90 (0.28–2.89) | 1 | 0.39 (0.05–2.82) | 2 | 2.79 (0.62–12.60) |
| Ptrend<0.01 | Ptrend<0.01 | Ptrend=0.10 | Ptrend<0.01 | |||||
Abbreviations: CI, confidence interval; IRR, incidence rate ratio
The P-value for trend was calculated using the Wald test for categorical variables modeled ordinally and excluded unknown values.
a
IRRs were adjusted for attained age, sex, race/ethnicity, transplanted organ, time since transplant, and year of transplantation.