Table 5– Pairwise linkage disequilibrium measure (D') for surfactant proteins A1, A2 and D alleles with regard to mannose-binding lectin (MBL) alleles from 748 healthy controls

	MBL2
	YB	YC	YD	XA	YA
*SFTPA1*
6A
6A²	0.53 (<0.0001)	0.55 (0.033)	0.74 (<0.001)	0.31 (0.001)
6A³	0.37 (0.039)		0.78 (0.006)
6A⁴	1 (0.003)
*SFTPA2*
1A⁰	0.45 (<0.001)	0.71 (0.003)	0.76 (<0.001)	0.37 (<0.001)
1A¹		1 (0.037)		0.42 (0.026)
SP-D

Data are presented as D' (p-value). D' values <0.3 or with a corresponding p-value >0.05 have not been considered. Linkage disequilibrium was measured using Arlequin 3.11 software. Only relevant haplotypes are shown. MBL2: mannose-binding lectin 2 gene.