Table 4.

Correlation between periapical and endodontic status

Periapical status	AP present	AP absent	Total
Endodontic status
Patients with RFT	97	136	233
Patients without RFT	38	126	164
Total	135	262	397

AP present, patients with one or more teeth with apical periodontitis (AP). AP absent, patients with no tooth with AP. Patients with RFT, patients with one or more root-filled teeth (RFT). Patients without RFT, patients with no RFT.

χ² test = 13.804; P = 0.00013.

Odds ratio (OR) for patients with RFT = 2.4 (95% confidence interval, 1.5–3.7).