Table 3

Summary of linkage analyses

Chromosome1/Position2

Model Independent Linkage Analysis

LOD score

Ordered Subset Analysis

Gene × smoking LOD score (p-value3)

Parametric Linkage Analysis

LOD score


Narrower4

Broader5

Narrower4

Broader5

Narrower4

Broader5


4q32.3/160–162 cM

0.5

1.3

NS6

NS

1.6

2.6

7p14.1/60–63 cM

0.7

0.6

4.1 (0.001)

3.2 (0.01)

0.4

0.7

7q22.3/116–118 cM

1.5

1.3

NS

NS

1.6

1.3

12p12.3/35–50 cM

1.4

1.4

NS

NS

2.4

3.1


1 Cytogenetic position of the maximum LOD score

2 Location of the maximum LOD score on the deCode map

3 Permutation testing was performed to obtain p-values associated with the increase in LOD score observed when modeling gene × smoking interaction when compared with modeling for genetic effects only.

4 Narrower disease model (n = 290 families)

5 Broader disease model (n = 333 families)

6 Not significant

Foroud et al. BMC Medical Genetics 2009 10:3   doi:10.1186/1471-2350-10-3

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