TABLE 4.

Performance of the multiplex immunoassay in relation to ESR and CRP results^a

Organism(s)	ESR elevatedb		ESR normal		CRP elevatedc		CRP normal
	Sensitivity	Specificity	Sensitivity	Specificity	Sensitivity	Specificity	Sensitivity	Specificity
Staphylococci targeted	50/60 (83.3) [72.3–91.2]	33/45 (73.3) [59.1–84.7]	7/12 (58.3) [30.2–82.8]	157/190 (82.6) [76.7–87.5]	59/79 (74.7) [64.2–83.3]	54/68 (79.4) [68.6–87.8]	9/14 (64.3) [37.6–85.6]	152/185 (82.2) [76.1–87.2]
S. aureus	26/34 (76.5) [60.2–88.4]	—d	3/6 (50) [14.7–85.3]	—	34/48 (70.8) [56.9–82.3]	—	2/5 (40) [7.3–81.8]	—
S. epidermidis	20/22 (90.9) [73.1–98.4]	—	3/6 (50) [14.7–85.3]	—	21/27 (77.8) [59.4–90.5]	—	5/8 (62.5) [27.8–89.4]	—
S. lugdunensis	6/6 (100) [60.7–100]	—	1/1 (100) [5–100]	—	7/7 (100) [65.2–100]	—	2/2 (100) [22.4–100]	—
Other staphylococci	6/7 (85.7) [47–99.3]	—	0/4 (0) [0–52.7]	—	5/9 (55.6) [24–84]	—	1/2 (50) [2.5,97.5]	—
S. agalactiae	6/8 (75) [38.8–95.6]	43/49 (87.8) [76.3–94.9]	—	180/192 (93.8) [89.6–96.6]	4/5 (80) [33.4–99]	64/70 (91.4) [83–96.5]	1/2 (50) [2.5–97.5]	176/189 (93.1) [88.8–96.1]
P. acnes	3/6 (50) [14.7–85.3]	45/50 (90) [79.2–96.2]	0/4 (0) [0–52.7]	166/198 (83.8) [78.2–88.5]	4/8 (50) [18.4–81.6]	59/71 (83.1) [73–90.5]	1/5 (20) [1–66.6]	167/195 (85.6) [80.2–90.1]

^aData are no. (%) [95% confidence interval].

^bLevels of ≥30 mm/h.

^cLevels of ≥10 mg/liter.

^d—, not applicable.