Respiratory symptoms and smoking habits in older people with age and sex differences.
D000367:Age Factors; D000368:Aged; D001991:Bronchitis / Q000209:etiology; D004417:Dyspnea / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012140:Respiratory Tract Diseases / Q000209:etiology*; D012494:Sampling Studies; D012606:Scotland; D012737:Sex Factors; D012907:Smoking / Q000150:complications*; D011795:Surveys and Questionnaires