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Thorax 54:289-295 doi:10.1136/thx.54.4.289
  • Original article

Vascularity in asthmatic airways: relation to inhaled steroid dose

Table 2

Summary of collagen type IV vessel staining in airway biopsy specimens

Patient group Total area
(mm2× 10−2) 		No. vessels/mm2 % Vascularity Vessel size (μm2)
Asthma/No ICS (n = 7) 6.22 (5.76–6.66) 485 (390–597)2-150 15.6 (13.1–18.0)† 342 (225–449)
Asthma/ICS (n = 15) 5.88 (4.96–6.75) 421 (281–534) 11.4 (9.1–14.9)2-152 334 (219–312)
Non-asthmatic controls (n = 11) 6.37 (6.02–6.73) 329 (248–376) 10.1 (8.4–13.3) 320 (224–448)
p value 0.71 0.089 0.009 0.63

  • Values are means (interquartile ranges).

  • ↵2-150 p<0.05, †p<0.01 compared with non-asthmatic controls.

  • ↵2-152 p<0.01 compared with patients with asthma/no ICS.

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