Match the type of bias to the example provided.

Misclassification bias

Selection bias

Recall bias

Measurement bias.

A. Participants are required to measure their weight weekly; they do so at home with un-calibrated scales.

B. Study comparing the impacts of shift work on cardiovascular disease
compares dietary behaviours in those that work nights at a local factory to those that work 9-5 in a nearby advertising agency.


C. Participants provide self-reported dietary information via an unvalidated food frequency questionnaire.

D. Different reference ranges for BMI used within the study , meaning that some participants are classified as obese when they should be in the morbid obese category.