Phenotyping emphysema and airways disease: Clinical value of quantitative radiological techniques

Table 3 Table to summarise studies performed in alpha one antitrypsin deficiency and chronic obstructive pulmonary disease directly comparing the most accurate measure of computed tomography density

Condition	Type of study	910	950	Perc15	Conclusion of superior measure	Ref.
Alpha one	RCT	x	x		950	Parr et al[29]
	RCT		x	x	950 and Perc15	Parr et al[30]
	RCT	x	x	x	Perc15	Parr et al[26]
	Review	x	x	x	Perc15	Hogg et al[28]
Chronic obstructive pulmonary disease	RCT	x	x	x	Perc15	Shaker et al[31]
	Review	x		x	Perc15	Dirksen et al[27]
	RCT		x	x	950	Chong et al[32]

Variables tested, type of study and conclusion of the most superior measure shown. RCT: Randomised controlled trial.