The top GWA signals at each locus from a meta-analysis of NFBC1966 and ALSPAC.

SNPs at genome wide significance P<5×10−8 and SNPS with suggestive evidence at 5×10−6>P>5×10−8. The P value of each cohort is corrected for sex, gestational age and population structure using principal components and genomic control. The combined P value is calculated using a fixed effects inverse variance meta-analysis. When no gene is within 50 kb of the SNP the chromosome band is given. Positions of SNPs are reported in NCBI build 36 coordinates. The alleles all refer to the forward strand. The effect allele is defined as the allele associated with later tooth eruption and a smaller number of teeth. % var is the percentage of variance explained by each SNP. P values attaining overall GWA significance are in bold.