ID	Integer	IBVD unique identifier for this subject group.
Method ID	Integer	IBVD Publication ID for publication(s) indicating methodology employed for this group.
Species	Text	Species of subjects in this group.
Species qualifier	Text	Subspecies of subjects in this group, for instance mouse strain.
Diagnosis	Text	Diagnosis of subjects in this group.
Vivoness	Text	Whether the volume measurement was done in vivo, in vitro, or ex vivo.
Number of subjects	Integer	Number of subjects in this group.
N male	Integer	Number of male subjects in this group.
N female	Integer	Number of female subjects in this group.
N left handed	Integer	Number of left handed subjects in this group.
N right handed	Integer	Number of right handed subjects in this group.
Mean age	Float	Mean age, in years, of subjects in this group.
Age std dev	Float	Standard deviation of ages, in years, of subjects in this group.
Age min	Float	Minimum age, in years, of subjects in this group.
Age max	Float	Maximum age, in years, of subjects in this group.
URL	Text	URL for this group (for on-line data sources or publications sharing data on-line).