From: Presence of human papillomavirus DNA in breast cancer: a Spanish case-control study
Cases (n = 251)
Controls (n = 186)
OR (CI 95%)
N
%
HPV
HPV+
130
51.8%
49
26.3%
3.0 **
HPV-
121
48.2%
137
73.7%
(2.0–4.5)