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Table 2 SNP calling measurements for Crossbow experiments using simulated reads from human chromosomes 22 and X

From: Searching for SNPs with cloud computing

  Chromosome 22 Chromosome X
  True number of sites Crossbow sensitivity Crossbow precision True number of sites Crossbow sensitivity Crossbow precision
All SNP sites 46,586 99.0% 99.1% 102,219 99.0% 99.6%
   Only HapMap SNP sites 36,096 99.8% 99.9% 71,976 99.9% 99.9%
   Only novel SNP sites 10,490 96.3% 96.3% 30,243 96.8% 98.8%
   Only homozygous 14,858 98.7% 99.9% NA NA NA
   Only heterozygous 31,728 99.2% 98.8% NA NA NA
   Only novel het 6,967 96.6% 94.6% NA NA NA
   All other 39,619 99.4% 99.9% NA NA NA
  1. Sensitivity is the proportion of true SNPs that were correctly identified. Precision is the proportion of called SNPs that were genuine. NA denotes "not applicable" because of the ploidy of the chromosome.