Callability Report
DRAGEN appends the percent callability for each region included in the BED file specified by the test and generates a full-callability-report in both BED and CSV formats. Callability is defined as the fraction of non-N reference positions having a PASSing genotype call. The following criteria are used to calculate callability metrics:
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Callability is calculated over the gVCF. |
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Multi-allelic variants are not counted. |
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Decoy contigs are ignored. |
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Unplaced and unlocalized contigs are ignored. |
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N positions are considered non-callable. |
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For regions where no variant calling was performed, callability is 0. |
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A homozygous deletion counts as a PASSing genotype call for all the reference positions spanned by the deletion. |