Initial data analysis

Framework of IDA

Analysis plan, planned analyses; intended analyses

Metadata

Conceptual metadata

Technical metadata

Data dictionary

Data cleaning

Data screening

Refining/Updating statistical analysis plan

Reporting

IDA team

Data collections

Primary data collection

Administrative data

Electronic health records

Large scale studies

Continuously growing data

Registries

Multi purpose study

Modes of data collection

Dimensionality

Data quality

Data quality monitoring

Manual inspection of data

Automization of data inspection

Sources of data errors

Data error

Duplicate records

Partial duplicates

Raw data

Clean data

Item missingness

Unit missingness

Data properties

Qualitative data properties

Quantitative data characteristics

Basic data summaries

Exploratory data analysis

Flow chart of the study

Refinement, extensions or reduction of models

Data preprocessing

Data dredging

Data snooping