Table 1

95th and 97th centiles for systolic blood pressure in babies

				Systolic blood pressure (mm Hg)
Study	Technique	Gestation	Age	95th centile	97th centile
*Awake.
American Academy of Pediatrics 2nd task force¹	First auscultation or Doppler	Term	Day 1	96
			Day 8–30	104

Brompton⁵	Mean of 3 Dopplers	Term	Day 4	95*
			6 weeks	113*

Northern Neonatal Nursing Initiative⁷	Mean of 3 or more Dopplers	Term	Day 1		82
			Day 10		111

Northern Neonatal Nursing Initiative	Mean of 3 or more Dopplers	24 weeks	Day 1		57
			Day 10		71
		28 weeks	Day 1		62
			Day 10		83
		32 weeks	Day 1		67
			Day 10		94
		36 weeks	Day 1		74
			Day 10		104