Missing-data investigation worksheet
StatMedAnalysis | Blank planning worksheet | 30 October 2026

Use for project planning; do not enter patient identifiers or credentials. Adapt to your protocol and institutional requirements. This is not a validated instrument.

Variable and operational definition:


Time point and denominator definition:


Expected / observed / missing counts:


Not applicable and unknown code definitions:


Counts by relevant group and time point:


Known reasons and source of information:


Participant-level patterns to investigate separately:


Proposed analysis assumptions (not established facts):


Sensitivity analyses to discuss:


Unresolved questions and responsible person: