Registration variables generally will be set by reading the output of the "jip-align" program (e.g., "align.com").
The independent variables are grouped into four blocks and include not only population characteristics that may be readily available in all medical research, say from health registrations (variable set 1, see Additional file 1: Table S1), but also characteristics that are not typically collected in medical surveys (variable sets 2-4, see Additional file 1: Table S1).
Therefore, we focus our evaluation on the robustness of image registration to variable lighting and naturally-occurring seasonal changes.
The authorities want registration of variables that can be quickly evaluated and publicly presented.
Registration includes variables such as gender, age, diagnosis, healing time, antibiotic treatment, and ulcer duration and size.
We conclude that the registration of variables related to newborn respiratory morbidity in the clinical database of newborns in Denmark, the NeoBase, had a quality that makes the NeoBase a valuable tool for clinical and epidemiologic research and quality assurance.
Data completeness was evaluated at two levels: 1) completeness of procedure registrations and 2) completeness of variable registrations.
However, the high levels of under-registration and the variable quality of routine registration of mortality data by cause of death from the Ministry of Health remains a problem.
Conversely, smooth areas have more variable registration across datasets, and the attendant misalignment leads to poorer performance when comparing predicted with observed effect sizes.
Therefore, the lack of a statistically significant effect could also be due to a poor quality of registration of this variable.
