Characteristics of the study sample (n = 154).

∏Presence with any following disease: hypertension, heart diseases, pneumonia, diabetes, asthma, rheumatoid arthritis, liver disease, cancers and other chronic diseases.¶p‡pNote: COPD = Chronic Obstructive Pulmonary Disease.Characteristics of the study sample (n = 154).合并存在下述任意一种疾病：高血压、心脏病、肺炎、糖尿病、哮喘、类风湿关节炎、肝病、癌症及其他慢性疾病。注：COPD即慢性阻塞性肺疾病（Chronic Obstructive Pulmonary Disease）。本研究样本（n=154）的特征信息。