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Table 4 Subgroup analysis of prior cancer history impact on overall survival stratified by the time interval in matched cohort

From: Effect of prior cancer on survival outcomes for patients with pancreatic adenocarcinoma: a propensity score analysis

   Time interval ≤ 5 years   Time interval > 5 years
No 1-year OS rates ((95% CI)) 2-year OS rates (95% CI) 3-year OS rates (95% CI) HR p b No 1-year OS rates (95% CI) 2-year OS rates (95% CI) 3-year OS rates (95% CI) HR p b
Without prior cancer 4380 33.0(32.9–33.2) 18.2(18.1–18.4) 11.7(11.6–11.8)    4380 33.0(32.9–33.2) 18.2(18.1–18.4) 11.7(11.6–11.8)   
Prostate cancer 44 42.9(42.8–43.0) 28.6(28. 5–28.7) 9.5(9.4–9.6) 0.905(0.670–1.220) 0.520 82 24.4(24.3–24.5) 11.3(11.2–11.4) 5.6(5.5–5.7) 1.249(0.956–1.632) 0.058
Breast cancer 25 100.0 53.9(53.7–54.1) 47.9(47.7–48.1) 0.309(0.228–0.420) < 0.001 85 12.8(12.7–12.9) 2.7(2.7–2.7) 2.7(2.7–2.7) 1.489(1.115–1.987) < 0.001
Renal and bladder cancer 23 33.1(32.9–33.3) 26.5(26.3–26.7) 0.0 1.073(0.645–1.785) 0.769 28 37.8(37.6–38.0) 18.9(18.8–19.0) 14.2(14.1–14.3) 0.904(0.612–1.340) 0.617
Colon and rectal cancer 20 40.0(39.8–40.2) 12.0(11.8–12.2) 12.0(11.8–12. 2) 0.941(0.593–1.494) 0.795 23 21.7(21.5–21. 9) 17.4(17.2–17.6) 11.6(11.5–11.7) 1.300(0.789–2.150) 0.219
Uterine cancer 3 66.7(66.2–67.2) 66.7(66.2–67.2) 66.7(66.2–67.2) 0.377(0.113–1.257) 0.291 21 37.8(37.6–38.0) 32.4(32.2–32.6) NA 0.719(0.453–1.143) 0.216
Lung cancer 8 62.5(62.2–62.8) 15.6(15.3–15.9) 0.0 0.751(0.395–1.429) 0.430 8 37.5(37.2–37.8) 18.8(18.5–19.1) 18.8(18.5–19.1) 0.958(0.464–1.980) 0.906
Small intestinal cancer 6 25.0(24.6–25.4) 25.0(24.6–25.4) 25.0(24.6–25.4) 1.180(0.406–3.400) 0.737 9 55.6(55.3–55.9) 0.0 0.0 0.804(0.413–1.560) 0.547
Oral cancer 3 100.0 33.3(32.8–33.8) 33.3(32.8–33.8) 0.441(0.175–1.106) 0.216 10 47.6(47.3–47.9) 19.0(18.8–19.2) 0.0 0.964(0.524–1.773) 0.904
Gastric cancer 7 21.4(21.1–21.7) 0.0 0.0 1.274(0.516–3.145) 0.535 5 60.0(59.8–60.4) 30.0(29.5–30.5) 30.0(29.5–30.5) 0.852(0.299–2.421) 0.772
Hepatocellular cancer 6 33.3(32.9–33.7) 16.7(16.4–17.0) 16.7(16.4–17.0) 0.942(0.402–2.206) 0.889 2 50.0(49.3–50.7) 0.0 0.0 1.101(0.257–4.720) 0.887
  1. CI Confidence interval, HR Hazard ratio, NA Not available, OS Overall survival
  2. pb-values represented the differences of overall survival rates between patients with certain kind of prior tumor and those without prior tumor