Which study design is it?

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Shakil Ahmed

Sanchi Dua This is a "Retrospective Cross-Sectional Study". You may find it useful in here. ( http://medicine.emory.edu/documents/research/kalogeropoulos-study-design-talk.pdf )

Jørgen Hilden

Yes, but it relies on (good) public registers, the word 'retrospective' should be down-toned. Is also a cohort, not just cross-sectional. Finally, it is not a sample but a geographically defined 'complete population study.' So 'complete-population cohort' is a a suitable designation.

The question here is not what you call it, but what it is - by virtue of what was done.

Sanchi Dua

Thank you Hilden and Ahmed. So should I classify it as a cross-sectional study design or a cohort study design?

Carolene Gloria Stephenson

This is a Retrospective Cross-Sectional Study. Good luck !

Sangappa Kashinakunti

It is a retrospective cohort study.