Table 3. Association between patient characteristics and positive or negative concordance between RT-PCR and antigen results.
| Variable | Odds Ratio for Positive Concordance | 95% confidence interval | Odds Ratio for Negative Concordance | 95% confidence interval |
|---|---|---|---|---|
| Sex at birth | ||||
| Male | 1.22 | 0.70 to 2.14 | 0.35 | 0.08 to 1.55 |
| Female | Reference | - | Reference | - |
| Race/Ethnicity | ||||
| Non-Hispanic Black | 0.62 | 0.02 to 17.39 | Omitted# | - |
| Hispanic | 1.17 | 0.07 to 19.38 | 3.71 | 0.38 to 36.43 |
| Other | 1.3 | 0.07 to 26.00 | Omitted# | - |
| Non-Hispanic White | Reference | - | Reference | - |
| Age Categories | ||||
| 5 to 11 years old | Reference | - | Reference | |
| 12 to 17 years old | 1.35 | 0.75 to 2.43 | 0.11 | 0.02 to 0.60 |
| Reason for testing | ||||
| Symptomatic | 1.66* | 0.92 to 2.98 | 0.22 | 0.06 to 0.88 |
| Asymptomatic | Reference | - | Reference | - |
| Ct Values | ||||
| Less than or equal to 25 | 15.60*** | 1.99 to 121.91 | - | - |
| 25.1 to 30 | 2.95*** | 1.32 to 6.58 | - | - |
| Greater than 30 | Reference | - | - | |
| Missing | 1.44 | 0.23 to 9.11 | - | - |
*p-value < 0.10;
**p-value < 0.05;
*** p-value < 0.01.
#Participants in these race-ethnicity groups were omitted from the regression because being in these race-ethnicity groups perfectly predicted negative concordance.