Analysis of data obtained from discrete variables requires the use of specific statistical tests which are different from those used to assess continuous variables (such as cardiac output, blood pressure, or PaO 2) which can assume an infinite range of values.
Primary symptoms of dengue appear three to 15 days after the mosquito bite and include the following: 1  high fever and severe headache, 2  with severe pain behind the eyes that is apparent when trying to move the eyes.
The primary symptoms of dengue are high fever, severe headache, muscle and joint pains. Dengue virus can vary in severity from mild acute febrile illness to a fatal infection. In most people the symptoms of dengue fever start within 4 to 7 days of bite of an infected mosquito.