Table I.
Geometric mean, standard deviation, and confidence intervals of the mean estimate, assuming that the distributions are lognormal
| Parameter | No. of samples | Geometric mean | Geometric SD | 95% CI |
|---|---|---|---|---|
| Hospital A | ||||
| Air (copies/m3) | 25 | 0.89 | 51 | 0.10–69 |
| Surface (copies/swab) | 59 | 10 | 24 | 1.9–34 |
| Surface (copies/cm2)a | 0.12 | 0.28 | 0.02–0.41 | |
| Hospital B1 | ||||
| Air (copies/m3) | 9 | 16 | 24 | 1.0–560 |
| Surface (copies/swab) | 23 | 12 | 9.7 | 1.0–160 |
| Surface (copies/cm2)a | 0.15 | 0.12 | 0.01–1.9 | |
SD, standard deviation; CI, confidence interval.
Below-detection-limit values have been probabilistically estimated based on the assumption of lognormality.
a
Surface loading distributions were estimated by dividing the copies/swab parameters by the mean of surface areas swabbed in the location reported.