The results as based on genome-wide meta-analyses of circulating leptin levels using HapMap2 imputed data in up to 32,161 individuals of European-ancestry. 

The files consist of the following information for each SNP and its association with leptin adjusted for age and sex (Leptin.txt), or leptin adjusted for age, sex, and BMI (LeptinAdjBMI.txt) 

SNP - The rs number of the genetic marker

Effect_all - The effect allele

Other_all - The other allele

Effect - Beta-coefficient for the additive effect of Effect_all on leptin levels

StdErr - Standard error for Effect, corrected for inflation of test statistics using genomic control at the individual study level, but not at the meta-analysis level 

P - P value after meta-analysis using Effect and StdErr

N - Number of observations

If you use these data, please cite: 
KilpelŠinen, T. O. et al. Genome-wide meta-analysis uncovers novel loci influencing circulating leptin levels. Nat. Commun. 7:10494 doi: 10.1038/ncomms10494 (2016).