Screening high-risk population of persistent postpartum hypertension in women with preeclampsia using latent class cluster analysis

Table 3 Event rates of PHTN in different clusters and associations of PHTN with risk clusters

Clusters	N	Event (%)	χ²	OR (95% CI)^a	OR (95% CI)^b
High-risk cluster (cluster 3)	312	77 (24.68) ^*#	51.854	4.915 (2.92, 8.27) ^△	2.931 (1.91, 4.49) ^△
Medium-risk cluster (cluster 2)	368	37 (10.05)		1.677 (0.95, 2.95)	1 (ref)
Low-risk cluster (cluster 1)	320	20 (6.25)		1 (ref)
Total	1000	134 (13.4)

^* P < 0.001 vs. low-risk cluster. ^# P < 0.001 vs. medium-risk cluster. ^△ P < 0.001. ^a Referent (ref) was low-risk cluster. ^b Referent (ref) was medium-risk cluster.

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