Table 2 Validity values of skin and needleless connector cultures for prediction of catheter colonization and catheter-related bloodstream infection
Cultures | S % | SP % | PPV % | NPV % | Validity index | Prevalence | LR+ | LR− |
|---|---|---|---|---|---|---|---|---|
(95 % CI) | (95 % CI) | (95 % CI) | (95 % CI) | (95 % CI) | (95 % CI) | (95 % CI) | (95 % CI) | |
Catheter colonization | ||||||||
Skin + NCs | 80.0 | 55.2 | 28.6 | 92.5 | 59.8 | 18.3 | 1.79 | 0.36 |
(56.4–100) | (42.6–67.9) | (13.7–4434)- | (83.0–100) | (48.5–71.0) | (9.3–27.3) | (1.24–2.58) | (0.13–1.02) | |
Skin | 66.7 | 82.0 | 45.4 | 91.7 | 79.3 | 18.3 | 3.72 | 0.41 |
(39.5–93.9) | (72.2–92.0) | (22.4–68.5) | (83.8–99.5) | (69.9–88.6) | (9.3–27.3) | (1.99–6.96) | (0.20–0.84) | |
NCs | 40.0 | 67.2 | 21.4 | 83.3 | 62.2 | 18.3 | 1.22 | 0.89 |
(11.9–68.1) | (55.2–79.2) | (4.24–38.4) | (72.5–94.2) | (51.0–73.3) | (9.3–27.3) | (0.60–2.47) | (0.57–1.40) | |
C-RBSI | ||||||||
Skin + NCs | 100 | 50.6 | 7.1 | 100 | 52.4 | 3.7 | 2.03 | NA |
(83.3–100) | (39.0–62.3) | (0.0–16.1) | (98.7–100) | (41.0–63.9) | (0.0–8.3) | (1.62–2.53) | ||
Skin | 100 | 75.9 | 13.6 | 100 | 76.8 | 3.7 | 4.16 | NA |
(83.3–100) | (65.9–86.0) | (0.0–30.2) | (99.2–100) | (67.0–86.6) | (0.0–8.3) | (2.81–6.15) | ||
NCs | 66.7 | 67.0 | 7.1 | 98.1 | 67.0 | 3.7 | 2.03 | 0.50 |
(0.0–100) | (56.0–78.0) | (0.0–18.5) | (93.6–100) | (56.3–77.8) | (0.0–8.3) | (0.86–4.79) | (0.10–2.48) | |