. 2019 Jun 14;105(2):184–189. doi: 10.1136/archdischild-2019-317131

Table 1.

Characteristics of preterm infants by genetic score blood pressure (gsBP)

	gsBP			P value*
	Low (<25th percentile), n=1395	Intermediate (25th–75th percentile), n=2790	High (>75th percentile), n=1395	P value*
Gestational age (weeks)	28.0±2.2	28.2±2.2	28.2±2.2	0.02
Birth weight (g)	1021±291	1023±303	1023±299	0.86
Girls (%)	46.7	47.8	47.2	0.85
Multiple birth (%)	28.7	27.1	28.9	0.93
Small for gestational age (%)	11.1	12.8	12.7	0.22
Lowest mean blood pressure on the first day of life (mm Hg)	27.3±6.2	27.6±6.4	27.9±6.4	0.009

*Two-sided p value comparing groups with low vs high gsBP. Gestational age, birth weight and mean blood pressure are given as mean±SD and compared with t-test. Fisher’s exact test was used to compare all other variables.