Table 2.
Illustration of the mean and standard COVID CT rate among the two dichotomized groups of geographical areas stratified on the RT-PCR rate, the total number of observation (Nobs), and for each group (Nobs1/Nobs2). The T test assesses significant differences between means among the two groups. Note: Data are absolute numbers and numbers in parentheses are percentages (rounded to the nearest decimal)
| Nobs (Nobs1/Nobs2) | CP | Mean1 ± sd1 | Mean2 ± sd2 | T test | |
|---|---|---|---|---|---|
| Week 12 | 76 (38/38) | No | 0.37 ± 0.23 | 0.35 ± 0.18 | – |
| Week 13 | 76 (21/55) | Yes | 0.53 ± 0.22 | 0.64 ± 0.18 | 0.03 |
| Week 14 | 74 (54/21) | Yes | 0.59 ± 0.19 | 0.67 ± 0.13 | 0.03 |
| Week 15 | 74 (31/43) | Yes | 0.52 ± 0.19 | 0.69 ± 0.17 | 0.0003 |