Table 2 Mean (95% confidence intervals) systolic blood pressure and diastolic blood pressure at gestational age of 12, 20 and 37 weeks for standard and reference charts, stratified by ethnicity.

From: Population reference and healthy standard blood pressure range charts in pregnancy: findings from the Born in Bradford cohort study

 Reference charts – All pregnanciesStandard charts - Healthy pregnancies
12 weeks20 weeks37 weeks12 weeks20 weeks37 weeks
All women
SBP108.8 (84.7, 132.9)109.1 (85.5, 132.7)112.5 (88.1, 136.9)105.0 (84.2, 125.8)104.9 (84.6, 125.3)107.7 (86.0, 129.4)
DBP64.7 (47.2, 82.2)64.5 (47.7, 81.4)68.2 (49.9, 86.4)62.1 (46.7, 77.4)61.8 (47.1, 76.4)64.8 (49.2 80.5)
White British women
SBP111.5 (87.2, 135.7)111.7 (88.3, 135.1)115.2 (91.1, 139.3)107.7 (87.2, 128.2)107.6 (88.3, 126.9)110.6 (89.7, 131.5)
DBP65.8 (48.0, 83.6)65.6 (48.3, 83.0)69.5 (51.1, 87.9)63.1 (47.6, 78.7)63.1 (47.8, 78.5)66.5 (50.4, 82.6)
Pakistani women
SBP106.7 (83.4, 129.9)107.0 (84.1, 130.0)110.3 (86.5, 134.2)104.0 (83.0, 124.9)103.8 (83.3, 124.5)106.4 (84.8, 128.0)
DBP63.9 (46.8, 81.0)63.7 (47.3, 80.2)67.1 (49.2, 85.1)61.5 (46.0, 76.9)61.0 (46.8, 75.3)64.0 (48.9, 79.0)