Table 3:

Multivariable logistic regression model of measures associated with a positive viral culture from pediatric samples

VariableAdjusted odds ratio (95% CI)
Cycle threshold*0.81 (0.69–0.94)
Symptoms to test time0.90 (0.64–1.27)
Age1.13 (0.97–1.31)
Sex2.18 (0.48–9.87)
RNAseP0.69 (0.48–1.00)
  • Note: CI = confidence interval, RT-PCR = reverse transcription polymerase chain reaction, SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.

  • * Cycle threshold is a semiquantitative measure of how much genetic material is present in the initial sample. If more RT-PCR cycles are required to detect SARS-CoV-2, then less viral RNA was present in the sample.

  • Cycle threshold values for human RNAse P gene, an endogenous internal amplification control, were used as a marker of quality of the nasopharyngeal sample.