[Retracted] Correlation of CCNA1 Promoter Methylation with Malignant Tumors: A Meta-Analysis Introduction

Table 1

Characteristics of included studies focused on methylation ratio of CCNA1.

First author	Year	Ethnicity	Disease	Sample	Number			Gender (M/F)	Age (years)	Method	NOS score
					Tumor	Benign	Normal
Longo [29]	2014	Caucasians	HNSCC	Tissue	96	0	79	75/21	59 (20~90)	qMSP	8
Liu [28]	2013	Asians	CC	Tissue	40	0	40	0/40	—	MSP	6
Weiss [10]	2011	Caucasians	HNSCC	Tissue	49	0	31	—	63.7 ± 11.8	MSP	7
Yang [9]	2010	Caucasians	CC	Tissue	60	40	20	—	46 (38~57)	qMSP	7
Yanatatsaneejit [20]	2008	Asians	NPC	Tissue	46	0	20	—	—	Duplex MSP	6
Brait [5]	2008	Caucasians	BCa	Tissue	93	0	26	—	67 (39~83)	qMSP	8
					25	0	5	—	66 (34~84)	qMSP
Yu [21]	2003	Asians	BCa	Tissue	132	23	0	107/25	—	MSP	8
Kitkumthorn [19]	2006	Asians	CC	Tissue	30	24	25	—	—	Duplex MSP	6
Tokumaru [12]	2004	Asians	HNSCC	Tissue	20	0	11	—	—	MSP	6
Yu [21]	2003	Asians	HCC	Tissue	28	0	28	—	—	MSP	6

M: male; F: female; NOS: Newcastle-Ottawa Scale; HNSCC: head and neck cancer; NSCLC: non-small-cell lung cancer; CC: choriocarcinoma; NPC: nasopharyngeal carcinoma; BCa: bladder cancer; HCC: hepatocellular carcinoma; MSP: methylation specific PCR.