From: Environmental correlates of crimean-congo haemorrhagic fever incidence in Bulgaria
A - Negative binomial regression for counts of CCHF cases | IRR* | 95%CI | P-value |
---|---|---|---|
Mean temperature (°C) | 1.055 | (1.048; 1.062) | < 0.001 |
Mean NDVI | 1.018 | (1.014; 1.022) | < 0.001 |
Habitat fragmentation level | |||
low | 1 | ||
medium | 1.402 | (1.120; 1.754) | 0.003 |
high | 1.558 | (1.137; 2.137) | 0.006 |
Proportion of areas covered by grasslands, scrub and herbaceous vegetation | |||
low | 1 | ||
medium | 3.994 | (1.812; 8.803) | 0.001 |
high | 4.260 | (1.960; 9.260) | < 0.001 |
Cattle density | 0.986 | (0.966; 1.006) | 0.160 |
Sheep density | 1.001 | (0.992; 1.010) | 0.853 |
Human density | 0.815 | (0.521; 1.278) | 0.374 |
B - Logistic regression for excess of zero CCHF cases | OR* | 95%CI | P-value |
Mean temperature (°C) in October-November of the previous year | 1.129 | (1.015; 1.257) | 0.026 |