Table 2:

The top 50 most frequent fields from the 3.4 billion JSON documents

Field	Frequency (millions)	Field	Frequency (millions)
sig	597	medications	139
active outpatient medications	397	o	137
comment	364	a	136
refills	360	level of understanding	132
qty	357	if	132
comments	339	chief complaint	132
last	317	heent	126
expr	315	location	126
plan	311	blood pressure	126
issu	304	vital signs	124
other	303	resp	119
allergies	283	skin	115
pulse	271	abdomen	115
date	271	bmi	112
pain	251	labs	112
weight	245	lungs	111
p	215	provider	110
assessment	189	eval	108
bp	172	objective	109
temp	161	neck	105
height	161	active non-va medications	102
age	157	activity	100
diagnosis	150	respiration	97
s	149	neuro	97
temperature	140	os	96