TABLE 4.
Logistic regression analysis of factors associated with positive blood and urine PCR resultse
| Variable | Crude odds ratio | 95 CI | P value | Adjusted odds ratio | 95 CI | P value |
|---|---|---|---|---|---|---|
| Positive blood PCRa | ||||||
| Male gender | 0.92 | 0.393–2.135 | 0.838 | −f | − | − |
| Age b | 1.02 | 0.995–1.049 | 0.089 | 1.03 | 0.996–1.068 | 0.078 |
| Severe form | 3.99 | 1.125–14.145 | 0.014 | 4.04 | 0.892–18.304 | 0.070 |
| Time between symptoms onset and samplingc | 0.551 | 0.435–0.697 | <0.001 | 0.554 | 0.430–0.714 | <0.001 |
| Antibiotic intake prior to samplingd | 0.306 | 0.141–0.663 | 0.003 | 0.503 | 0.198–1.395 | 0.196 |
| Positive urine PCRa | ||||||
| Male gender | 0.597 | 0.066–5.387 | 0.646 | − | − | − |
| Age b | 0.993 | 0.9498–1.0378 | 0.750 | − | − | − |
| Severe form | 0.883 | 0.1998–3.901 | 0.869 | − | − | − |
| Time between symptom onset and samplingc | 0.879 | 0.746–1.034 | 0.120 | .8895 | 0.7491–1.0563 | 0.182 |
| Antibiotic intake prior to samplingd | 0.222 | 0.0259–1.901 | 0.170 | 0.2606 | 0.0297–2.2815 | 0.224 |
a
Multivariable analysis was made for 135 patients (one missing data for PCR date and one missing data for antibiotic initiation date) for blood PCR and 61 patients (no missing data) for urine PCR.
b
Age effect was analyzed with a 1-year increment.
c
Time since symptom onset was analyzed with a 1-day increment.
d
Antibiotic intake prior to sampling was defined as administered since at least the day before sampling.
e
Bold indicates significant association (P value < 0.05).
f
"–", not applicable.