Asthma Classification

Asthma is clinically classified according to the frequency of symptoms, FEV1 and peak expiratory flow rate.[6] Asthma may also be classified as atopic (extrinsic) or non-atopic (intrinsic), based on whether symptoms are precipitated by allergens (atopic) or not (non-atopic).

	Symptoms	Night Symptoms	%FEV1 of Predicted	FEV Variability
Intermittent	more than 1 per week	more than 2 per month	less than 80%	more than 20%
Mild persistent	less than 1 per week but more than 1 per day	less than 2 per month	less than 80%	20–30%
Moderate persistent	Daily	less than 1 per week	60–80%	less than 30%
Severe persistent	Daily	Frequent	more than 60%	less than 30%

Main Article: Lung Disease: Asthma

Asthma Causes - Asthma Risk Factor

Factors that influence the risk of asthma can be divided into those that cause the development of asthma and those that trigger asthma symptoms or both of them. Research shows that asthma is caused by environmental and genetics factors. Some environmental and genetic factors have been confirmed by further research, while others have not been.

Asthma Symptoms

Asthma is a serious global health problem. People of all ages in countries throughout the world are affected by this chronic lung disease, when uncontrolled, can place severe limits on daily life and is sometimes fatal. The prevalence of asthma is increasing in most countries, especially among children. Asthma is a significant burden, not only in terms of health care costs but also of lost productivity and reduced participation in family life.

Asthma type can also divide from its symptoms whether the symptoms are precipitated by allergens (atopic) or not (non-atopic). Asthma symptoms may vary depend on its severity, there are asthma common symptoms that most patient more likely had. But, not all asthma patient has all of those symptoms.

Asthma

Asthma is a lung disease that one of the most common chronic disease worldwide. Asthma patient keep increasing each year and mostly among children. During WHO, asthma costs more than HIV and tuberculosis combined.*

Asthma has caused 4,000 death in USA each year, and there are 300 million people diagnosed with asthma worldwide. Asthma is a chronic inflammatory disorder of the airways in which many cells and cellular elements play a role.