[Inflammatory indexes and their association with the severity of preeclampsia].

Background: Recent studies have confirmed the relationship between some inflammatory indexes and preeclampsia (PE); however, they have not been analyzed in PE with and without severity criteria.

Objective: To know the association between inflammatory indexes and the severity of PE.

Material and methods: Analytical cross-sectional prolective study. Pregnant patients were included, divided into group 1 (PE without severity criteria); group 2 (PE with severity criteria); group 3 (normotensive pregnant women). Records were reviewed and inflammatory indexes [(neutrophil-lymphocyte ratio [NLR], platelet-lymphocyte ratio [PLR], lymphocyte-monocyte ratio [LMR] and systemic immune index [SII]) were calculated.

Results: 240 patients were analyzed, 80 per group; age 28 (IQR 27-29) years. A significant difference was observed between group 1, group 2 and group 3, NLR 3.29 (IQR 2.82-3.69), 3.59 (IQR 2.83-4.2) and 3.42 (IQR 3.17-3.92), respectively, p = 0.02; PLR 121.59 (IQR 103.78-132), 108.32 (IQR 92.96-127.43) 136 (IQR 115.18-157.56), respectively, p = 0.01; LMR and SII showed no difference between the groups. LMR made possible to distinguish PE with and without severity criteria, cut-off point of ≥ 3.20, sensitivity 56%, specificity 56%, AUC 0.56, p = 0.01, and cut-off point ≥ 3.24, sensitivity 58%, specificity 58%, AUC 0.57, p = 0.04, respectively; the LMR ≥ 3.24 was associated with PE without severity criteria (OR 2.02 [95%CI 1.08-3.80], p = 0.03).

Conclusions: The MLR was the only inflammatory index analyzed that was associated with the presence of PE without severity data. No inflammatory index was associated with PE with severity data.