Interleukin-6-174G/C Polymorphism Contributes to Periodontitis Susceptibility: An Updated Meta-Analysis of 21 Case-Control Studies

Table 3

Meta-regression analyses (P value).

Genetic model	HWE	Smoke	Gender	Method	Control
C versus G	0.121	0.832	0.224	0.805	0.539
GC VS GG	0.004	0.100	0.113	0.689	0.537
CC + GC VS GG	0.000	0.267	0.448	0.870	0.736
CC VS GG + GC	0.895	0.624	0.877	0.309	0.335