Table 1.

Levels of the six collagen IV α chain NC1 domains observed in stained airway sections from lymphangioleiomyomatosis (LAM) and control individuals

	n	α1	α2	α3	α4	α5	α6
LAM (SEM)	8	2.16 (±0.26)	2.28 (±0.18)	0.5 (±0.16)	2.63 (±0.17)	0.56 (±0.12)	2.33 (±0.12)
Control (SEM)	4	1.72 (±0.3)	2.21 (±0.17)	2.29 (±0.20)	2.72 (±0.20)	2.47 (±0.22)	2.5 (±0.20)

Scoring results obtained from three independent observers blinded to the patient diagnosis using the following scale: 0: Absence of stain; 1: Weak and discontinuous staining; 2: Weak and continuous staining; 3: Strong and continuous staining.