Development and validation of a screening tool for SPondyloArthritis Screening in Sub-Saharan Africa: SpASSS questionnaire

Table 4 Performance of the global component in relation to the different control groups

	Se (%)	Sp (%)	PPV (%)	NPV (%)	AUC
SpA cases vs non-SpA rheumatic controls	97.4	92.0	74.0	99.3	0.947 (0.903–0.991)
SpA cases vs healthy control population	100.0	93.9	74.0	100.0	0.982 (0.966–0.998)
SpA case vs the two control groups	97.4	96.4	74.0	99.7	0.967 (0.939–0.995)

Se Sensivity, Sp Specificity, PPV Positive predictive value, NPV Negative predictive value, AUC Area under the curve

ISSN: 1471-2288