Table 5 Cases distribution (and person-days at risk) for different levels of shower contaminations and associations' measure.
From: Pontiac fever: an operational definition for epidemiological studies
Contamination threshold | Exposure categories | Number of subjects with Pontiac fever (person-days at risk) | RR (and p*) |
|---|---|---|---|
CFU ≥ 103 L-1 | Exposed Unexposed | 10 (24855) 13 (42001) | 1.30 (0.33) |
CFU ≥ 104 L-1 | Exposed Unexposed | 9 (20928) 14 (45928) | 1.41 (0.27) |
Cells-FISH ≥ 104 L-1 | Exposed Unexposed | 23 (56245) 0 (10611) | UD** (0.02) |
Cells-FISH ≥ 105 L-1 | Exposed Unexposed | 19 (48265) 4 (18591) | 1.83 (0.19) |
Cells-FISH ≥ 106 L-1 | Exposed Unexposed | 11 (20185) 12 (46671) | 2.12 (0.05) |