Association of Common Variants in MMPs with Periodontitis Risk

Figure 2

Forest plot of periodontitis risk associated with MMPs polymorphisms under all comparison models.

(a) Mutant allele versus wild allele

(b) Homozygous rare versus homozygous frequent

(c) Heterozygous versus homozygous frequent

(d) Homozygous rare versus heterozygous

(e) Heterozygous + homozygous rare versus homozygous frequent

(f) Homozygous rare versus heterozygous + homozygous frequent

(g) Heterozygous versus homozygous frequent + homozygous rare