Table 5

Correlation (Spearman's rho) between CT densitometry and baseline IL-8


All patients (n = 38)
Excluding tubular bronchiectasis (n = 31)

UZ Perc15
rs = -0.464 (p = 0.005)
rs = -0.558 (p ≤ 0.001)
UZ VI -950HU
rs = 0.447 (p = 0.005)
rs = 0.591 (p ≤ 0.001)



LZ Perc15
rs = -0.447 (p = 0.005)
rs = -0.454 (p = 0.005)
LZ VI -950HU
rs = 0.353 (p ≤ 0.02)
rs = 0.401 (p ≤ 0.02)

UZ = upper zone, LZ = lower zone, VI = voxel index, Perc15 = 15th percentile point, HU = Hounsfield Units.

Parr et al. Respiratory Research 2006 7:136   doi:10.1186/1465-9921-7-136