Title	Page number
Figures
Figure S1	PRISMA flow diagram for study inclusion and exclusion	See separate
Tables
Table S1	Details of QUADAS-2 assessment for included studies	3-6
Table S2	Study characteristics arranged by strength of association with preeclampsia by highest BP category reported	7-8
Table S3	ACC/AHA blood pressure categories reported by each study for measurements taken <20 weeks	9
Table S4	Sensitivity and specificity of ACC/AHA BP categories for preeclampsia	10
	Other main outcomes
Table S5	Association of ACC/AHA BP levels at <20 weeks and serious maternal complications	11
Table S6	Sensitivity and specificity of ACC/AHA BP categories for serious maternal outcomes	12
Table S7	Association of ACC/AHA BP levels at <20 weeks and preterm birth	13
Table S8	Sensitivity and specificity of ACC/AHA BP categories for preterm birth	14
Table S9	Association of ACC/AHA BP levels at <20 weeks and perinatal death	15
Table S10	Sensitivity and specificity of ACC/AHA BP categories for preterm birth	16
Table S11	Association of ACC/AHA BP levels at <20 weeks and stillbirth	17
Table S12	Sensitivity and specificity of ACC/AHA BP categories for stillbirth	18
Table S13	Association of ACC/AHA BP levels at <20 weeks and newborn death	19
Table S14	Sensitivity and specificity of ACC/AHA BP categories for newborn death	20
Table S15	Association of ACC/AHA BP levels at <20 weeks and SGA infants	21
Table S16	Sensitivity and specificity of ACC/AHA BP categories for SGA infants	22
Table S17	Association of ACC/AHA BP levels at <20 weeks and NICU admission	23
Table S18	Sensitivity and specificity of ACC/AHA BP categories for NICU admission	24
	Other secondary outcomes
Table S19	Association of ACC/AHA BP levels at <20 weeks and eclampsia	25
Table S20	Sensitivity and specificity of ACC/AHA BP categories for eclampsia	26
Table S21	Association of ACC/AHA BP levels at <20 weeks and stroke	27
Table S22	Sensitivity and specificity of ACC/AHA BP categories for stroke	28
Table S23	Association of ACC/AHA BP levels at <20 weeks and maternal admission to intensive care	29
Table S24	Sensitivity and specificity of ACC/AHA BP categories for maternal admission to intensive care	30
Table S25	Association of ACC/AHA BP levels at <20 weeks and placental abruption	31
Table S26	Sensitivity and specificity of ACC/AHA BP categories for placental abruption	32
Table S27	Association of ACC/AHA BP levels at <20 weeks and Cesarean	33
Table S28	Sensitivity and specificity of ACC/AHA BP categories for Cesarean	34

Slade. The diagnostic accuracy of American College of Cardiology-American Heart Association blood pressure categories for identification of women and babies at risk. Am J Obstet Gynecol 2023.