Answer:
A. Cohort study
Explanation:
It is basically a cohort study because in this we can evaluate the incident rate at a particular time for a particular disease. .
Likely the chronological age, mainly because it would explain the differences in puberty stages between the two boys, which is an example of physical maturation.
Atopic dermatitis or commonly known as eczema is a condition
that makes your skin red and itchy. This chronic skin disease tends to flare
periodically and often accompanied by asthma or hay fever. Symptoms include thickened,
cracked, scaly skin or raised bumps that may leak fluid and crust over when
scratched. The physician usually prescribed corticosteroid cream or ointment and sometimes antihistamine
drugs to control the itching and help repair the skin.
Alopecia areata is a common condition
that affects the integumentary system that results in baldness or hair loss.
This autoimmune disorder often use powerful anti-inflammatory drugs that can
suppress the immune system. Most commonly, corticosteroids is used to treat
alopecia areata. The route of administration are local injections, taken orally
or by topical ointment application.
