Table 2. Validation assessment of Emoqol-100 with reference standard PHQ-9
Emoqol-100
RangeLikelihood ratio positivePositive predictive valuea
0–2010.196%
21–402.987%
41–601.374.5%
61–800.447.4%
81–1000.215%

  • aAlso known as the post-test likelihood of a positive test. Likelihood ratio positive = sensitivity/(1-specificity) (these scores are >1.0). Likelihood ratio negative = 1-sensitivity/(specificity) (these scores are <1.0). PHQ-9 = 9-item Patient Health Questionnaire.