Table 2.

The underlying diseases of the patients.

System	Diseases
Digestive system	Duodenal ulcer, cholecystolithiasis, fatty liver, hepatitis, reflux esophagitis, and helicobacter pylori infection
Respiratory system	Bronchial asthma, chronic obstructive pulmonary disease, atelectasis, and sleep apnea syndrome
Circulatory system	Obsolete myocardial infarction, coronary heart disease, arrhythmia, pulmonary artery embolism, and pulmonary heart disease
Nervous system	Obsolete cerebral infarction, cerebral atrophy, cerebral hemorrhage, Parkinson's disease, epilepsy, and febrile convulsion
Mental system	Anxiety disorder, depressive disorder, sleep disorders, and hypophrenia
Endocrine and metabolic	Hyperlipidemia, gout, hyperthyroidism, hypothyroidism, and hypopituitarism