Table 6.
Discriminant function analysis and development of the discriminating functions
| ss scale | ll scale | ||||||
|---|---|---|---|---|---|---|---|
| Correct (%) | sl or ll | ss | Correct (%) | sl or ss | ll | ||
| ss | 15.79 | 3 | 16 | ll | 56 | 28 | 22 |
| sl or ll | 99.16 | 1 | 118 | ss or sl | 85.23 | 13 | 75 |
| Total | 87.68 | 4 | 134 | Total | 74.64 | 41 | 97 |
The ss scale discriminates between ss and combined sl and ll carriers (recessive model). The ll scale discriminates between ll and combined ss and sl carriers (dominant model).
Function for ll scale: 0.09 × item 7 + 0.89 × item 17 + 0.34 × item 27 + 0.40 × item 29 + 0.79 × item 39 + 0.39 × item 68 + 0.26 × item 69 + 0.09 × item 92 + 0.26 × item 94 + 0.68 × item 107 - 0.91 <0 then it is either an ss or sl genotype.
Function for ss scale: 1.19 × item 55 + 0.77 × item 57 + 0.94 × item 71 + 0.14 × item 89 + 1.14 × item 98 + 0.36 × item 103 - 0.02 × item 105 + 0.53 × item 107 - 4.38 <0 then it is NOT an ss genotype.