Table 5.
Summary statistics for the bootstrapped coliphage densities in raw wastewater.
| MSC | Somatic |
||||
|---|---|---|---|---|
| Analysis | N | Mean (95% CI) | Standard Deviation (95% CI) | |
| Stage 1 | ||||
| Geographic region | North America | 229 | 47 | 5.9 (5.7, 6.0) | 5.2 (4.9, 5.6)** | 1.1 (1.0, 1.2) | 1.3 (1.1, 1.5) |
| Europe | 129 | 196 | 4.7(4.6, 4.9) | 5.7 (5.5, 5.9)** | 0.8 (0.7, 1.0) | 1.2 (1.1, 1.3) | |
| Africa | - | 8 | - | 6.1 (5.7, 6.6) | - | 0.7 (0.6, 1.0) | |
| Asia | 39 |82 | 5.8 (5.7, 6.0) | 7.1 (7.0, 7.2)** | 0.4 (0.3, 0.6) | 0.6 (0.5, 0.7) | |
| Season | Spring | 89 | 87 | 5.5 (5.3, 5.7) |6.6 (6.4, 6.9)** | 1.0 (0.8, 1.3) | 1.2 (1.0, 1.5) |
| Summer | 43 | 55 | 5.5 (5.1, 5.9) | 6.2 (5.9, 6.5)* | 1.3 (1.0, 1.6) | 1.2 (1.0, 1.5) | |
| Fall | 42 | 20 | 6.1 (5.9, 6.4) | 6.6 (6.3, 6.8) | 0.9 (0.6, 1.2) | 0.5 (0.4, 0.7) | |
| Winter | 106 | 52 | 6.3 (6.1, 6.4) | 6.8 (6.6, 7.0)** | 0.8 (0.6, 1.0) | 0.8 (0.7, 0.9) | |
| Stage 2 | Accounting for geographic region | 5.8 (5.4, 6.1) |6.0 (5.7, 6.4) | 1.0 (0.7, 1.4) | 1.3 (1.0, 1.6) | |
| Accounting for season | 5.9 (5.5, 6.1) | 6.5 (6.2, 6.8) | 1.0 (0.7, 1.4) | 1.0 (0.7, 1.3) | ||
a
Significant comparisons between MSC and somatic means by regions and seasons using t-tests (α=0.05):
*
p-value < 0.05
**
p-value < 0.001. All values are log10 PFU/L.
MSC = male-specific coliphage.