Human papillomavirus infection and risk of breast cancer: a meta-analysis of case-control studies

Table 3 Comparison of three meta-analyses for HPV infection and breast cancer risk

First author [reference number]	Searching Periods	Selected articles	Total Cases	Total Controls	SOR (95 % CI)
Li [12]	- May 2010	10	447	275	3.63 (1.42–9.27)
Simoes [11]	- Jan 2011	9	448	279	5.9 (3.23–10.67)
Zhou [13]	- Jun 2013	16	n.d.	n.d.	3.24 (1.59–6.57)
This study	- Sep 2015	22	1897	948	4.02 (2.42–6.68)

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