Exposure | Symptoms | ||||
---|---|---|---|---|---|
Cyanobacterial cell surface area1 | None | Present | Crude models2 | Multivariable3 | |
n (%) | n (%) | O.R. (95%CI) | O.R. (95%CI) | ||
Any symptom | |||||
Low | 569 (70) | 241 (30) | 1 | 1 | |
Intermediate | 134 (74) | 46 (26) | 0.8 (0.6–1.2) | 0.8 (0.6–1.3) | |
High | 99 (67) | 48 (33) | 1.6 (1.0–2.7) | 1.7 (1.0–2.9) | |
Ear symptoms | |||||
Low | 895 (96) | 33 (4) | 1 | 1 | |
Intermediate | 199 (98) | 4 (2) | 0.6 (0.2–1.5) | 0.5 (0.2–1.5) | |
High | 159 (96) | 7 (4) | 1.9 (0.6–6.5) | 2.0 (0.6–7.1) | |
Eye symptoms | |||||
Low | 872 (94) | 59 (6) | 1 | 1 | |
Intermediate | 196 (95) | 10 (5) | 0.8 (0.4–1.8) | 0.8 (0.4–1.9) | |
High | 154 (95) | 9 (6) | 0.6 (0.2–1.6) | 0.6 (0.3–1.7) | |
G-I symptoms | |||||
Low | 871 (94) | 57 (6) | 1 | 1 | |
Intermediate | 199 (95) | 10 (5) | 0.9 (0.4–1.7) | 0.9 (0.4–1.8) | |
High | 158 (95) | 8 (5) | 0.9 (0.3–2.2) | 0.9 (0.4–2.2) | |
Respiratory symptoms | |||||
Low | 691 (86) | 116 (14) | 1 | 1 | |
Intermediate | 169 (88) | 24 (12) | 1.0 (0.6–1.6) | 0.9 (0.6–1.6) | |
High | 122 (82) | 27 (18) | 2.0 (1.1–3.7) | 2.1 (1.1–4.0) | |
Cutaneous symptoms | |||||
Low | 875 (95) | 43 (5) | 1 | 1 | |
Intermediate | 197 (96) | 8 (4) | 0.7 (0.3–1.7) | 0.7 (0.3–1.8) | |
High | 159 (96) | 7 (4) | 1.9 (0.9–4.3) | 1.9 (0.9–4.4) | |
Fever | |||||
Low | 938 (99) | 10 (1) | 1 | 1 | |
Intermediate | 208 (99) | 3 (1) | 1.5 (0.4–5.6) | 1.8 (0.5–6.7) | |
High | 165 (99) | 2 (1) | 2.0 (0.5–8.7) | 1.8 (0.4–8.1) | |
Any symptom – after exclusion of subjects with recent (5 days prior to recruitment) exposure | |||||
Low | 436 (67) | 200 (31) | 1 | 1 | |
Intermediate | 74 (69) | 33 (31) | 0.9 (0.6–1.5) | 0.9 (0.6–1.5) | |
High | 71 (69) | 32 (31) | 1.5 (0.8–2.9) | 1.6 (0.8–3.2) |