Gestational week-specific of uterine artery Doppler indices in predicting preeclampsia: a hospital-based retrospective cohort study

Table 2 Performance of the uterine artery indices in predicting early-onset or preterm preeclampsia developed within nine weeks after the Doppler scan^*

Gestational weeks at delivery	No. of women	PE type (No. of total PE cases)	Cases within the 9^th week (%)	Uterine artery parameters	Sensitivity (%, 95% CI)	Specificity (%, 95% CI)
Any weeks	29,628	Early PE (118)	57 (48.3%)	Right PI	66.7 (54.4–78.9)	87.7 (87.4–88.1)
				Right RI	63.2 (50.6–75.7)	91.6 (91.3–91.9)^a
				Left PI	73.7 (62.3–85.1)	84.6 (84.2–85.0)^a,c
				Left RI	71.9 (60.3–83.6)	84.6 (84.2–85.0)^a,c
< 37	1484	Preterm PE (236)	54 (22.9%)	Right PI	68.5 (56.1–80.9)	79.9 (77.9–82.0)
				Right RI	64.8 (52.1–77.6)^a	85.9 (84.1–87.1)^a
				Left PI	75.9 (64.5–87.3)^d	77.3 (75.1–79.4)^b,c
				Left RI	74.1 (62.4–85.8)^d	77.3 (75.2–79.5)^b,c
< 37	1354	Early PE (106)	54 (50.9%)	Right PI	68.5 (56.1–80.9)	82.2 (80.1–84.2)
				Right RI	64.8 (52.1–77.6)	87.5 (85.7–89.3)^a
				Left PI	75.9 (64.5–87.3)	79.3 (77.1–81.5)^a,c
				Left RI	74.1 (62.4–85.8)	79.3 (77.1–81.5)^a,c
< 34	274	Early PE (78)	50 (64.1%)	Right PI	72.0 (60.0–84.4)	80.8 (75.6–86.0)
				Right RI	68.0 (55.1–80.9)	86.2 (81.6–90.7)^d
				Left PI	80.0 (68.9–91.1)	78.6 (73.2–83.9)^c
				Left RI	78.0 (66.5–89.5)	76.8 (71.3–82.3)^c

^*Late-onset cases were excluded from the models
^aP < 0.001, ^bP < 0.01, ^dP < 0.05 for the difference comparing with the RPI; ^cP < 0.001 comparing with the RRI

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