Table 1 TDT analysis of full, centromeric and telomeric KIR haplotypes for type 1 diabetes association with stratification by DR3/4 status

From: KIR haplotypes are associated with late-onset type 1 diabetes in European–American families

KIR Haplotype a

Trans

N-trans

TDTtest b

P-valuec

Trans %

OR (95% CI)

A B full, non-DR3/4

 A1

236

183

6.70

0.0096

56.3%

1.29 (1.06–1.56)

 A2

91

91

0.00

1.00

50.0%

1.00 (0.75–1.34)

 B

283

314

1.61

0.20

47.4%

0.90 (0.77–1.06)

 Others

37

59

5.04

0.0247

38.5%

0.63 (0.42–0.95)

A B full, DR3/4

 A1

128

121

0.20

0.66

51.4%

1.06 (0.83–1.36)

 A2

53

53

0.00

1.00

50.0%

1.00 (0.68–1.46)

 B

185

198

0.44

0.51

48.3%

0.93 (0.76–1.14)

 Others

31

25

0.64

0.42

55.4%

1.24 (0.73–2.10)

Cen haplotypes, non-DR3/4

 cA01

421

381

2.00

0.16

52.5%

1.10 (0.96–1.27)

 cB01

109

117

0.28

0.59

48.2%

0.93 (0.72–1.21)

 cB02

80

90

0.59

0.44

47.1%

0.89 (0.66–1.20)

 Others

37

59

5.04

0.0247

38.5%

0.63 (0.42–0.95)

Cen haplotypes, DR3/4

 cA01

232

220

0.32

0.57

51.3%

1.05 (0.88–1.27)

 cB01

67

87

2.60

0.11

43.5%

0.77 (0.56–1.06)

 cB02

67

65

0.03

0.86

50.8%

1.03 (0.73–1.45)

 Others

31

25

0.64

0.42

55.4%

1.24 (0.73–2.10)

Tel haplotypes, non-DR3/4

 tA01

324

266

5.70

0.0169

54.9%

1.22 (1.04–1.43)

 tA02

142

149

0.17

0.68

48.8%

0.95 (0.76–1.20)

 tB01

144

173

2.65

0.10

45.4%

0.83 (0.67–1.04)

 Others

37

59

5.04

0.0247

38.5%

0.63 (0.42–0.95)

Tel haplotypes, DR3/4

 tA01

181

189

0.17

0.68

48.9%

0.96 (0.78–1.17)

 tA02

93

98

0.13

0.72

48.7%

0.95 (0.71–1.26)

 tB01

92

85

0.28

0.60

52.0%

1.08 (0.81–1.45)

 Others

31

25

0.64

0.42

55.4%

1.24 (0.73–2.10)

  1. Abbreviations: CI, confidence interval; OR, odds ratio.
  2. aA B Full=haplotypes containing both the centromeric and telomeric groups. A1=3DL3-2DL3-2DP1-2DL1-3DP1-2DL4-3DL1-2DS4Del-3DL2; A2=3DL3-2DL3-2DP1-2DL1-3DP1-2DL4-3DL1-2DS4FL-3DL2; B=haplotypes with at least one activating KIR gene; cA01=3DL3-2DL3-2DP1-2DL1-3DP1; cB01=3DL3-2DS2-2DL2-3DP1; cB02=3DL3-2DS2-2DL2-2DL5C-2DS3S5C-2DP1-2DL1-3DP1; tA01=2DL4-3DL1-2DS4Del-3DL2; tA02=2DL4-3DL1-2DS4FL-3DL2; tB01: 2DL4-3DS1-2DL5-2DS3S5T-2DS1-3DL2; others: haplotypes with frequency <1.0%.
  3. bTDT tests were performed separately for each affected sibling in a family. Testing using an average of the two siblings for each family gave similar results; however, the P-values did not reach statistical significance.
  4. cSignificant P-values (> 0.05) are indicated with bold type. P-values are uncorrected based on prior hypothesis for KIR-T1D association.
  5. Trans, number of transmitted haplotypes; N-trans, number of untransmitted haplotypes.