TABLE 3.
Factors associated with disagreement between Xpert® Flu/RSV and Allplex™ RP1 in the detection of influenza A, influenza B, or RSV (univariate analysis)
| Concordant (+/+ or −/−) | Discordant (∓ or ±) | Total | OR (95% CI) | P‐value | |
|---|---|---|---|---|---|
| Gender | |||||
| Female (Ref) | 401 | 8 | 409 | 1.49 (0.64‐3.48) | .354 |
| Male | 490 | 15 | 505 | ||
| Total | 891 | 23 | 914 | ||
| Age category | |||||
| <18 y (Ref) | 418 | 11 | 429 | 0.96 (0.43‐2.16) | .923 |
| ≥18 y | 473 | 12 | 485 | ||
| Total | 891 | 23 | 914 | ||
| Influenza season | |||||
| No (Ref) | 496 | 6 | 502 | 3.38 (1.36‐8.40) | .009 |
| Yes | 395 | 17 | 412 | ||
| Total | 891 | 23 | 914 | ||
| Setting | |||||
| Inpatient (Ref) | 392 | 6 | 398 | 2.11 (0.85 = 5.26) | .107 |
| ED | 499 | 17 | 516 | ||
| Total | 891 | 23 | 914 | ||
| Specimen type | |||||
| NP swab (Ref) | 447 | 13 | 460 | ||
| NP aspirate | 301 | 6 | 307 | 0.71 (0.23‐1.84) | .487 |
| Other a | 143 | 4 | 147 | 1.04 (0.35‐3.07) | .944 |
| Total | 891 | 23 | 914 | ||
| Hospital | |||||
| A (Ref) | 247 | 7 | 254 | ||
| B | 66 | 0 | 66 | 0.25 (0.01‐4.40) | .342 |
| C | 109 | 0 | 109 | 0.15 (0.01‐2.66) | .196 |
| D | 43 | 4 | 47 | 3.41 (1.02‐11.47) | .047 |
| E | 275 | 7 | 282 | 0.99 (0.32‐2.51) | .838 |
| F | 24 | 3 | 27 | 4.71 (1.24‐17.91) | .023 |
| G | 127 | 2 | 129 | 0.64 (0.15‐2.75) | .555 |
Abbreviations: ED, emergency department; NP, nasopharyngeal.
a
NP swab (Allplex) and NP aspirate (Xpert) or NP aspirate (Allplex) and NP swab (Xpert) or the use of sputum or bronchial lavages in one of the assays.