Hi,Veterinary dermatologists test dogs for a variety of allergens, including cat and human dander, trees, molds, house dust, dust mites, fleas, grasses and household synthetics.o, the allergy testing shows a total of 7 allergens to which she responded with an allergic reaction (the human dander being the highest). I believe that if there are more than 3 or 4 allergens contributing to the allergy, it is very unlikely that desensitization will be effective.
Trend analysis is the practice of collecting information and attempting to spot a pattern, or trend, in the information. In some fields of study, the term trend analysis has more formally defined meanings.
Scatter plots are useful data visualization tools for illustrating a trend. 1  If the vertical (or y-axis) variable increases as the horizontal (or x-axis) variable increases, the correlation is positive.  If the y-axis variable decreases as the x-axis variable increases or vice-versa, the correlation is negative.