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Bonus Project (3 hours)

Cont. from project II

Task IV: Case Matching

Match each Case Subject (those with breast cancer) to one Control Subject.

Ensure the following criteria are achieved:
  1. Case Subject must be at the same age as the matching Control Subject

  2. One Control Subject can only match one Case Subject. No duplication is allowed.

  3. If more than 1 Control Subject can be matched to a Case Subject, the Control Subject should be randomly selected.
    ​
  4. The Control Subject must have a termination date after the Case Subject.


Task V: Case Matching (Range of Age)

Match each Case Subject (those with breast cancer) to one Control Subject.

Ensure the following criteria are achieved:
  1. Case Subject must be with (±1) age as the matching Control Subject.

    E.g. If the Case Subject is 34 years old, the matching Control Subject can be either 33, 34 or 35.


  2. One Control Subject can only match one Case Subject. No duplication is allowed.
    ​
  3. The Control Subject must have a termination date after the Case Subject.

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