Figure 1.
Meta-analysis of associations between periodontal disease and lung cancer in cohort studies
Legends: PD = periodontal disease; RR = relative risks; *ARIC study reported compared moderate to no/mild PD and severe to no/mild PD. The random-effects meta-analysis did not adjust for the correlation between the two adjusted RRs in ARIC study; and thus, the pooled estimate was slightly inflated.