Table 3.

Regular expression rule-based approach for vital sign labeling.

Vital Sign	Context Words	Units Considered	Text Patterns	Labeled Example In format: word {LABEL}
Height	“height”, “height:”, “ht”, “ht:”	‘inches’, ‘in’, ‘feet’, ‘ft’, ‘m’, ‘meters’, ‘cm’, ‘centimeters’, ''' (for feet) '''' (for inches)	[number]	Ht: 63.5 {HEIGHT}
			[number] [unit]	Patient height is 63.5 {HEIGHT} inches {HEIGHT_UNIT}
			[number] [unit] [number] [unit]	Height: 5 {HEIGHT} feet {HEIGHT_UNIT} 11 {HEIGHT} inches {HEIGHT_UNIT}
Weight	“weight”, “weight:”, “wt”, “wt:”	‘pounds’, ‘lbs’, ‘lb’, ‘ounces’, ‘oz’, ‘kilograms’, ‘kg’, ‘grams’, ‘g’	[number]	Wt: 180 {WEIGHT}
			[number] [unit]	Current weight is 65.9 {WEIGHT} kg {WEIGHT_UNIT}
			[number] [unit] [number] [unit]	Patient’s weight is 170 {WEIGHT} lbs {WEIGHT_UNIT} 9 {WEIGHT} oz {WEIGHT_UNIT}
Blood Pressure	“pressure”, “bp”, “bp:”	–	[number]/[number]	Blood pressure is 128/70 {BP}