I see results reported as NA, NC, or "indeterminate". What does this mean?

When you see an "indeterminate" SNP on your report, or "Note: Unfortunately, the presence of this SNP could not be determined from your saliva sample. This prevents its use in the assessment of this gene.", this means the SNPs could not be called due to a poor saliva sample. 

NC stands for "No call" and represents an inability to confidently determine alleles, so no call was reported. The SNPs will show a call of "-", or "NC" meaning that the lab was unable to report that specific SNP due to poor saliva sample. This could be caused by the following reasons:

• Not enough DNA
• The saliva sample was possibly slightly contaminated with bacterial DNA or other contaminants 

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NA stands for "not available" and is equivalent to "not Genotyped". Simply put, this represents a SNP covered by a previous version of StrateGene, that is no longer quantified in the current version.