Table 5 Summary of the factor extraction measures used in exploratory factor analysis of the Severity of Dependence for Khat (SDS-Khat) in polysubstance users
Number of Factors | Eigenvalue | Cumulative Variance Explained (%) | Above point of inflection on Scree plot | Decision to extract | ||
|---|---|---|---|---|---|---|
Kaiser’s criteria (Eigenvalue≥1) | Cumulative variance rule (> 40%) | Scree test | ||||
1 | 2.97 | 37.67 | Yes | √ | √ | √ |
2 | 0.97 | 57.04 | Yes | Χ | √ | Χ |
3 | 0.87 | 73.39 | No | Χ | Χ | Χ |
4 | 0.80 | 88.48 | No | Χ | Χ | Χ |