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Table 9 Estimates of lifetime attributable risk (LAR) of breast cancer incidence

From: Estimation of lifetime attributable risk incidence and mortality for breast cancer attributed to computed tomography of the head in the Niger Delta Region of Nigeria

  LAR Incidence per 100,000 population
Centre G1 Centre G2
Age at Exposure (years) Minimum Maximum Mean Approximate risk Minimum Maximum Mean Approximate risk
20–29 13.43 37.45 26.45 1 in 396 3.58 9.27 6.56 I in 15,244
30–39 7.19 19.6 10.63 1 in 9434 1.26 5.46 2.88 1 in 34,722
40–49 3.37 11.08 5.99 1 in 16,667 0.64 3.03 1.87 1 in 53,191
50–59 1.06 3.61 2.11 1 in 47,619 0.41 1.39 0.87 1 in 113,636
60–69 0.40 2.17 0.95 I in 150,270 0.08 0.41 0.28 1 in 357,143
70–79 0.09 0.87 0.54 1 in 185,185 0.05 0.32 0.14 1 in 714,286
80–89 0.04 0.26 0.14 1 in 714,286 0.05 0.06 0.06 1 in 1,666,667
Overall 0.04 37.45 7.17 1 in 1426 0.05 9.27 1.35 1 in 74,074