Table 2.
CoNS Species Distribution in Patients with Definite IE and Patients with Possible IE/BSI Only, and Comparison of Time to Positivity.
| Characteristic | Overall (n = 247) |
Definite IE (n = 49) |
Possible IE/BSI Only (n = 198) |
p Value |
|---|---|---|---|---|
| CoNS species | <0.001 1 | |||
| S. epidermidis | 196 (79.4%) | 33 (67.3%) | 163 (82.3%) | |
| S. lugdunensis | 22 (8.9%) | 13 (26.5%) | 9 (4.5%) | |
| S. devriesei/haemolyticus | 11 (4.5%) | 1 (2.0%) | 10 (5.1%) | |
| S. capitis | 7 (2.8%) | 1 (2.0%) | 6 (3.0%) | |
| S. hominis | 6 (2.4%) | 0 (0.0%) | 6 (3.0%) | |
| Other CoNS * | 5 (2.0%) | 1 (2.0%) | 4 (2.0%) | |
| Methicillin resistance | 163 (66.5%) | 25 (52.1%) | 138 (70.1%) | 0.018 1 |
| Time to positivity, hours | 19.0 (15.0–22.5) | 21.0 (16.0–24.0) | 19.0 (15.0–22.0) | 0.035 2 |
Values represent frequency (percentage) for discrete variables and median (quartile 1 to quartile 3) for continuous variables. p values are by 1 Pearson χ2 or 2 Wilcoxon rank sum tests. * Infrequent CoNS species were grouped into a single ‘other’ level, which includes S. capitis (n = 1), S. caprae (n = 1), S. pettenkoferi (n = 1), S. simulans (n = 1), and S. warneri (n = 1). BSI, bloodstream infection; IE, infective endocarditis.