Table 2 shows the associations between all SNPs, growth parameters and adult height from additive models per adult height increasing allele identified in previous studies. To assess age-dependent effects of the variants on growth velocity, the p-value for interaction between the SNP and age (puberty vs. infancy) on PHV is shown. The interaction analyses formally tested the hypothesis that different genetic variants are involved in height growth regulation at different stages of life. Due to a high correlation between ATO and age at PHV2 (Table S1), genetic associations for ATO are omitted from Table 2 but the main results are reported in the text. All the analyses were adjusted for sex and principal components (PCs; see Materials and Methods: Statistical Analyses) but not for socio-economic status (SES), birth length or gestational age since the additional adjustment for these variables did not essentially change the results. Table S2 shows further information on these SNPs, including SNP and gene information and allele frequencies. To assess statistical significance, we use p<0.05 significance level for adult height, PHV1, PHV2 and the age-SNP interaction on
