Table 5.

Sensitivity, specificity, positive and negative predictive values, accuracy by diagnostic method and their combinations (Based on patients n = 200)

	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)	Accuracy (%)	Confidence intervall (of accuracy)
Standard culture	79.2	76.6	65.5	86.7	77.5	71.7–83.3
Sonication (overall)	80.6	74.2	63.7	87.2	76.5	70.6–82.4
Sonication conventional	56.9	85.9	69.5	78.0	75.5	69.5–81.5
Sonication with membrane filtration	79.2	78.9	67,9	85,7	78.0	72.3–83.7
Tissue homogenization	73.6	89.1	79.1	85.7	84.5	79.5–89.5
Histology	33.3	100	100	72.7	76.0	70.1–81.9
Standard culture and histology	88.9	76.6	68.1	92.5	81.0	75.6–86.4
Sonication and histology	90.3	74.2	66.3	93.1	80.0	74.5–85.5
Tissue homogenization and histology	90.3	89.1	82.3	94.2	89.5	85.3–93.7
Standard culture and sonication	97.2	57.8	56.5	97.4	72.0	65.8–78.2
Standard culture and tissue homogenization	93.1	68.0	62.0	94.6	77.0	71.2–82.8