Table 2

Results of the odds ratio calculation on the replication sample (sample B)

Genotypes

Genotype distribution (n [%])

Odds ratio

95% Confidence interval


RA index (n = 100)

Pseudo-controlsa (n = 300)


S2/S2

9 (9)

11 (3.6)

18.0

4.5–71.1

S2/S3P

19 (19)

17 (5.7)

19.5

6.6–57.2

S2/L

23 (23)

63 (21)

5.3

2.0–13.9

S3P/S3P

5 (5)

7 (2.3)

8.7

2.1–36.9

S3P/L

25 (25)

77 (25.7)

3.1

1.4–6.9

L/L

19 (19)

125 (41.7)

1

-


Alleles S2, S3P and L are defined according to amino acid sequence at positions 70–74, as described in Table 1. The L alleles are the low-risk alleles S1, S3D and X. The reference genotype is L/L. aPseudo-controls are the three other genotypes that could be formed by the parental genotypes.

Michou et al. Arthritis Research & Therapy 2006 8:R79   doi:10.1186/ar1949

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