The data was taken from the following post:
viewtopic.php?f=84&t=145&start=20#p1892(assembled and cleaned by Zhenghua Gong)
Number of samples: 1255
Variables with missing dataDiseaseGrade: 1206 missing samples;
age: 53 missing samples;
gender: 31 missing samples;
Due to limited number of samples with available Disease Grade, this variable were removed;
Number of samples after dropping DiscreteGrade, and dropping samples for which gender or age is missing: 1202
The cleaned data is attached.