In a Case‐control Study of the Association Between Residence near a Hazardous

question 4

Multiple Choice

In a case‐control study of the association between residence near a hazardous waste site and leukaemia, selection bias is likely to be a problem because:

• A)People with leukaemia may be more likely to participate than controls recruited from the general population
• B)People with leukaemia living near a hazardous waste site may be more likely to participate than people living further away.
• C)People without leukaemia living near a hazardous waste site may be more likely to participate than people living further away
• D)All of the above

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