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. 2006 Dec 18;1:21. doi: 10.1186/1748-7161-1-21

Table 1.

Transmission of alleles of MATN1 gene in the 81 families of the study and ETDT results

Allele T NT T.R. χ2 p Chi-square statistics
99 bp 2 6 25% χ2 for "allele-wise" ETDT = 6.355804, 2 gl, p = 0.041757
101 bp 28 43 39% 3.169 0.0751 χ2 for "genotype-wise" ETDT = 11.007881, 3 gl, p = 0.011743
103 bp 45 26 63% 5.0585 0.0242 χ2 for goodness-of-fit "allele-wise" model = 4.65207, 1 gl, p = 0.03106

T = number of transmitted alleles; NT = number of non-transmitted alleles; T.R.: transmission rate (%) = T/(T+NT) × 100.

ETDT is calculated as χ2 = (T - NT)2/(T + NT), 1 d.f. for each allele and consequently a logistic regression is performed outputting chi-squared statistics with 2 d.f. for allele-wise analysis and 3 d.f. for genotype-wise analysis.