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Table 3 Comparison of mammographic density between breast cancer cases and controls

From: TNRC9 rs12443621 and FGFR2 rs2981582 polymorphisms and breast cancer risk

  Category 1 Category 2 Category 3 Category 4 Total χ 2 P
Cases 8(8.89) 27(30.00) 51(56.67) 4(4.44) 90   
Controls 8(3.49) 101(44.10) 114(49.78) 6(2.62) 229 4.453 0.035
Totals 16 128 165 10 319