Predictor | Culture | Comparison (reference = no pretreatment) | Odds Ratio for Positive Culture | |
---|---|---|---|---|
Pretreatment (vs. none) with antibiotics | ORa (95% CIb) | P-value | ||
N = 525 | Blood | – | 0.90 (0.56–1.44) | 0.66 |
N = 90 | Bone | – | 0.77 (0.25–2.34) | 0.64 |
N = 262 | Joint | – | 0.71 (0.39–1.28) | 0.26 |
N = 196 | Other | – | 1.18 (0.58–2.41) | 0.65 |
Hours of antibiotics (for pretreated cultures) | Culture | Comparison (reference = 0- < 4 h) | OR (95% CI) | P-value |
N = 113 | Blood | 4 to < 24 h | 1.24 (0.44–3.52) | 0.90 |
> 24 h | 1.34 (0.35–5.22) | 0.78 | ||
N = 50 | Bone | 4 to < 24 h | 1.11 (0.06–19.93) | 0.90 |
> 24 h | 1.57 (0.08–31.4) | 0.68 | ||
N = 91 | Joint | 4 to < 24 h | 1.36 (0.36–5.06) | 0.93 |
> 24 h | 1.67 (0.35–8.01) | 0.58 | ||
N = 139 | Other | 4 to < 24 h | 0.77 (0.24–2.46) | 0.28 |
> 24 h | 1.60 (0.44–5.77) | 0.25 |