Table 1.- Variants (SNPs) included in the PRS calculation
(Disease/Trait: Bronchopulmonary_dysplasia)
rsID	Risk allele	Effect size
rs556493	A	0.301
rs9953270	C	0.288
rs17551536	G	0.386
rs71627250	T	0.501
rs349423	T	0.924
Effect size: LN(OR)

Table 2.- PRS Score distribution among populations and regions
(Disease/Trait: Bronchopulmonary_dysplasia)
	count	mean	sd	se	lower.ci	upper.ci
Pyrenean regions
WEST	168	0.064	0.036	0.003	0.058	0.069
SOUTH	83	0.065	0.038	0.004	0.056	0.073
EAST	146	0.061	0.033	0.003	0.056	0.067
Populations
IBS	107	0.066	0.038	0.004	0.059	0.074
PIR	397	0.063	0.035	0.002	0.059	0.066

Table 3.- Pairwise t-test for PRS score among populations and regions
(Disease/Trait: Bronchopulmonary_dysplasia)
group1	group2	n1	n2	p	p.signif	p.adj	p.adj.signif
IBS	PIR	107	397	0.384	ns	1	ns
IBS	WEST	107	168	0.538	ns	1	ns
IBS	SOUTH	107	83	0.754	ns	1	ns
IBS	EAST	107	146	0.258	ns	1	ns
WEST	SOUTH	168	83	0.822	ns	1	ns
WEST	EAST	168	146	0.548	ns	1	ns
SOUTH	EAST	83	146	0.475	ns	1	ns
* p < .05, ** p < .01, *** p < .001

Table 4.- Chi-square test comparison of percentile counts on Pyrenean regions compared to Iberian peninsula population
(Disease/Trait: Bronchopulmonary_dysplasia)
Percentile rank	PIR				WEST				SOUTH				EAST
	adj.std.val	p.value	sig.val		adj.std.val	p.value	sig.val		adj.std.val	p.value	sig.val		adj.std.val	p.value	sig.val
pct95	−0.240	0.810	.	white	−0.550	0.582	.	white	−0.240	0.810	.	white	−1.900	0.057	.	white
pct75.95	0.230	0.818	.	white	−0.160	0.873	.	white	0.230	0.818	.	white	−0.230	0.818	.	white
pct50.75	−0.080	0.936	.	white	1.260	0.208	.	white	−0.080	0.936	.	white	1.310	0.190	.	white
pct25.50	−1.540	0.124	.	white	−1.300	0.194	.	white	−1.540	0.124	.	white	−1.680	0.093	.	white
pct25	1.460	0.144	.	white	0.390	0.697	.	white	1.460	0.144	.	white	1.200	0.230	.	white
adj.std.val: Adjusted standardized residuals value; p.value: P value; sig.val: statistical significance, * p < .05, ** p < .01, *** p < .001; red dash to bottom: lower counts than reference; green dash to up: upper counts than reference