Indicators of air pollution are:
ASulphur dioxide, lead, particulate matter
BSulphur dioxide, hydrogen sulphide, carbon monoxide
CCarbon dioxide, hydrogen sulphide, lead
DSulphur dioxide, smoke, particulate matter
A study was conducted to investigate the relationship between COPD and smoking. Data was collected from government hospital records on COPD cases and cigarette sales records from finance and taxation departments. What is the study design?
ACross-sectional study
BOperational study
CCase-control study
DEcological study
Which of the following is least likely to be associated with emphysema?
AAssociated with smoking
BType I respiratory failure
CBarrel shaped chest
DCyanosis
+ 7 more in the PDF
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