Factors | Assignments |
---|---|
Educational background (X1) | 1 = High school degree or above, 2 = below high school degree |
Working countries (X2) | Countries were divided into three groups according the incidence, 3 = >20% (high-affected courtiers), 2 = 10–20% (middle-affected countries), 1 = 5–10% (low-affected countries) |
Type of the local ecological environment (X3) | According the infection rate, types separated into two groups, 2 = mountainous regions and others, 1 = city, plain and island |
Working duration (X4) | Figured on a monthly basis |
Intensity of mosquito bite prevention (X5) | Cases without any protective measure are defined as a set of “0”; cases using one measure are defined as a set of “1”; cases using two measures are defined as a set of “2”, and so on |