Table 1.

Characteristics of 10 studies included in the meta-analysis

Reference	Region	Number of HPV 16 positive in cases	HPV16 prevalence in cases	Number of HPV 16 positive in controls	HPV 16 prevalence in controls	Types of specimen1	HPV detection method
Liu et al. [17]	Chongqing	43/112	0.38	4/74	0.05	FF	L1
He et al. [18]	Henan	56/110	0.51	7/45	0.16	FE	E6
Chen et al. [19]	Xinjiang	34/80	0.43	11/80	0.14	FE	E6
Liu et al. [20]	Shaanxi	35/69	0.51	2/32	0.06	FE	E6
Han and Chen [21]	Shandong	121/204	0.59	12/102	0.12	FE	L1
Guo et al. [22]	Henan	70/300	0.23	21/900	0.02	FF	L1
Hu et al. [23]	Xinjiang	82/200	0.41	24/150	0.16	FE	E6
Liu et al. [24]	Henan	54/78	0.69	11/30	0.37	FF	L1
Zhang et al. [38]	Guangdong	62/106	0.58	22/100	0.22	FE	E6
Cui et al. [26]	Xinjiang	53/183	0.29	8/89	0.09	FE	L1

¹FF: Fresh-Frozen; PE: Paraffin-Embedded.