. 2011 Nov 13;28(2):167–175. doi: 10.1093/bioinformatics/btr629

Table 3.

The definitions of x₉₈ to x₁₀₆

(98) Forward strand non-reference base ratio F₂₄/F₄	(103) Sum of squares of non-reference mapping quality ratio F₃₃/F₁₃
(99) Reverse strand non-reference base ratio F₂₅/F₅	(104) Sum of non-reference tail distance ratio F₃₆/F₁₆
(100) Sum of non-reference base quality ratio F₂₈/F₈	(105) Sum of squares of non-reference tail distance ratio F₃₇/F₁₇
(101) Sum of squares of non-reference base quality ratio F₂₉/F₉	(106) Non-reference allele depth ratio F₇₅/F₅₅
(102) Sum of non-reference mapping quality ratio F₃₂/F₁₂

These features are used to boost weak mutation signals in the tumour and decrease the influence of germline polymorphism. In this table, F_i means the normalized version of the i-th feature.