Table 3: Discriminatory power of the five QEESI scales either when used alone (univariate analyses) or when combined in a multivariate logistic regression model.
Scale univariate
-value
Odds ratio (95% CI) one-point increase
Area under ROC curve
Symptom severity
<0.0001
1.07 (1.06–1.08)
0.88 (0.85–0.90)
Chemical intolerances
<0.0001
1.11 (1.09–1.12)
0.97 (0.95–0.98)
Other Intolerances
<0.0001
1.07 (1.06–1.08)
0.84 (0.81–0.87)
Life Impact
<0.0001
1.10 (1.09–1.12)
0.97 (0.96–0.98)
Masking Index (rev)*
<0.0001
2.48 (2.16–2.06)
0.81 (0.78–0.84)
Multivariate
Chemical intolerances
<0.0001
1.06 (1.05–1.08)
0.98
Life Impact
<0.0001
1.06 (1.05–1.07)
*Scores on the Masking Index were reversed in the statistical analyses.