差分

!rowspan="2"|[Example]<br>A cohort study in which participants self report their body weight every week via special app installed on their smartphones. Demographic variables are also collected.

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!style="width:7em"|other observed variable(s)

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!Missing not at random

!MNAR

|style="text-align:center"|&mdash;

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!Missing at randam

!MAR

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*'''15% of female participants denied to report''' their body weights after participation '''regardless of measured body weights''', but only 1% of male denied to report

*Researchers can identify that female participants more likely denied to report body weights than male

**Missing occurred NOT because of body weights themselves but '''because of another variable ''sex'''''

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!Missing completely at random

!MCAR

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*A participant '''moved to outside cohort area''' because of family affair and was lost to follow up