. 2015 Sep 10;8:2519–2526. doi: 10.2147/OTT.S83004

Table 2.

Sample sizes and MMP1–1607 1G>2G allele and genotype distributions in the studies considered in the present meta-analysis

Gene	First author’s name (year)	Cases						Controls						HWE of control (P-value)	Frequency of 1G allele in controls	Quality^*
Gene	First author’s name (year)	N	2G/2G	1G/2G	1G/1G	2G	1G	N	2G/2G	1G/2G	1G/1G	2G	1G	HWE of control (P-value)	Frequency of 1G allele in controls	Quality^*
MMP1–1607	Matsumura et al²⁰ (2004)	215	101	88	26	290	140	166	88	61	17	237	95	Y (0.1953)	0.713855	7
1G/2G	Jin et al¹⁹ (2005)	183	112	51	20	275	91	350	194	105	51	493	207	N (0.0000)	0.704286	7
	Fang et al¹⁸ (2010)	246	155	85	6	395	97	252	161	78	13	400	104	Y (0.3826)	0.793651	7
	Devulapalli et al¹⁶ (2014)	166	46	114	6	206	126	202	50	130	22	230	174	N (0.0000)	0.569307	7
	Dey et al¹⁷ (2014)	145	56	66	23	178	112	145	53	72	20	178	112	Y (0.2713)	0.613793	6
	Hua et al⁴ (2014)	422	186	187	49	559	285	428	158	195	75	511	345	Y (0.5686)	0.596963	7

Note:

Represents the confidence of the study.

Abbreviations: MMP1, matrix metalloproteinase-1; HWE, Hardy–Weinberg equilibrium; N, number of subjects.