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Table 1 Demographic, pathological, and virological characteristics of the selected cohort

From: HPV infection and triple-negative breast cancers: an Italian case-control study

Variables n = 80 Triple-negative Other receptor pattern p-value
(n = 40) (n = 40)
Mean age (SD), years 60.3 (14.2) 60.3 (15.8) 60.3 (12.6) 0.99
Histotype, n (%) Invasive ductal 67 (83.8) 31 (77.5) 36 (90.0) 0.11
Invasive lobular 5 (6.3) 2 (5.0) 3 (7.5)
Others 8 (10.0) 7 (17.5) 1 (2.5)
Grading, n (%) 1 6 (7.6) 0 (0.0) 6 (15.0) <0.0001
2 39 (49.4) 11 (28.2) 28 (70.0)
3 34 (43.0) 28 (71.8) 6 (15.0)
HPV+, n (%) [CI 95%] 6 (7.5) [1.7-13.3] 6 (7.5) [1.7-13.0] 0 (0.0) [0.0-0.0] 0.026
  1. SD: Standard Deviation.
  2. CI: Confidence Interval.