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. Author manuscript; available in PMC: 2022 Sep 1.
Published in final edited form as: Placenta. 2021 Jul 30;112:135–140. doi: 10.1016/j.placenta.2021.07.298

Table 3.

Associations between chronic villitis in the first study pregnancy and subsequent recurrence among those with two placental pathology reports (n=883).

Unweighted Data Weighted Dataa
RR 95% CI RR 95% CI
Unadjusted 2.76 2.25, 3.37 2.48 2.01, 3.07
Adjustedb 2.59 2.12, 3.15 2.36 1.92, 2.91

Abbreviations: CI – confidence interval; RR – risk ratio

a

Weighted to reflect the distribution of maternal, pregnancy, and placental characteristics observed among those with their first placenta submitted to pathology (inverse probability weighting)

b

Adjusted for maternal race/ethnicity, interpregnancy interval, and maternal age at delivery and parity at the first study pregnancy