Modified Child-Pugh classification of severity of liver disease according to the degree of ascites, the plasma concentrations of bilirrubin and albumin, the prothrombin time, and the degree of encephalopathy.
Severity
GOLD Staging System for Chronic Obstructive Lung Disease (COPD) Severity
The European Respiratory Society (ERS) diagnostic criteria for COPD include the following symptoms: coughing, sputum production and/or dyspnoea, as well as a history of exposure to risk factors for COPD. The diagnosis is confirmed by a post-bronchodilator FEV1/FVC < 0.7 in spirometry, as sign of the airflow limitation that is not fully reversible.
GINA Classification of Asthma Severity
The Global Initiative for Asthma (GINA) works with health care professionals and public health officials around the world to reduce asthma prevalence, morbidity, and mortality. The gold standard in classifying severity of asthma is the GINA classification.
The APACHE II Severity of Disease Classification System
APACHE II uses a point score based upon initial values of 12 routine physiologic measurements, age, and previous health status to provide a general measure of severity of disease.
Classification and Severity of Angina
Class I
No angina with ordinary physical activity (e.g., walking, climbing stairs). Angina with strenuous or prolonged exertion.
Class II
Early-onset limitation of ordinary activity (e.g., walking rapidly or walking >2 blocks; climbing stairs rapidly or climbing >1 flight); angina may be worse after meals, in cold temperatures, or with emotional stress.