Steps of an epidemiological study:

Usually, an epidemiologic study consists of the following steps:

Systematic literature search 

Systematic review of the literature regarding a specific clinical or public health question 

Critical appraisal of published or unpublished studies 

Planning of a new study

defining the exact study questions

(usually in close cooperation with clinicians or public health experts)

developing the study design

determining the number of required subjects to obtain meaningful results

(sample size calculation, statistical power calculation)

developing and writing the detailed study protocol 

Organising the execution of the study 

Analysing the study with standard and sophisticated statistical methods

(usually in close cooperation with statisticians / mathematicians) 

Writing of scientific papers to publish the results in renowned international journals 

Writing of papers to publish the results for the general public

(All medical writing is usually carried out in English, if appropriate in German.)

According to my clients' needs, I offer all the steps of a study, from the planning to publication.

If only some of the steps are needed, you may obviously commission me to carry out the single steps that you need. For example, in many cases a systematic review of the literature together with a critical appraisal of published or unpublished studies may already provide the answer to your question.