Table 6.

Predictive ratios for periodontal disease and adverse pregnancy outcomes

	Preterm	Low birthweight	Preterm low birthweight
Sensitivity (%)	83.1 (75.9–88.8)	96.4 (90.9–99)	94.3 (86.2–98.4)
Specificity (%)	33 (27.7–38.6)	35.7 (30.5–41.4)	32.08 (27.3–37.1)
LR+	1.24 (1.11–1.38)	1.50 (1.37–1.64)	1.39 (1.27–1.52)
LR−	0.51 (0.34–0.76)	0.10 (0.04–0.27)	0.18 (0.07–0.46)
PPV (%)	36.9 (31.6–42.5)	33.1 (27.9–38.5)	21 (16.6–25.8)
NPV (%)	80.5 (72.3–87)	96.8 (91.8–99.1)	96.5 (91.8–99.1)

LR+, positive likelihood ratio; LR−, negative likelihood ratio; NPV, negative predictive value; PPV, positive predictive value.