Table 2 TDT analysis of full, centromeric and telomeric KIR haplotypes for type 1 diabetes association with stratification by age of onset

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, age onset14

 A1

265

228

2.78

0.10

53.8%

1.16 (0.97–1.39)

 A2

96

117

2.07

0.15

45.1%

0.82 (0.63–1.07)

 B

362

361

0.00

0.97

50.1%

1.00 (0.87–1.16)

 Others

45

62

2.70

0.10

42.1%

0.73 (0.49–1.07)

A B full, age onset >14

 A1

95

70

3.79

0.0516

57.6%

1.36 (1.00–1.85)

 A2

45

26

5.08

0.0241

63.4%

1.73 (1.07–2.80)

 B

102

146

7.81

0.0052

41.1%

0.70 (0.54–0.90)

 Others

20

20

0.00

1.00

50.0%

1.00 (0.54–1.86)

Cen haplotypes, age onset 14

 cA01

472

453

0.39

0.53

51.0%

1.04 (0.92–1.19)

 cB01

139

147

0.22

0.64

48.6%

0.95 (0.75–1.19)

 cB02

112

106

0.17

0.68

51.4%

1.06 (0.81–1.38)

 Others

45

62

2.70

0.10

42.1%

0.73 (0.49–1.07)

Cen haplotypes, age onset >14

 cA01

173

140

3.48

0.0621

55.3%

1.24 (0.99–1.54)

 cB01

37

56

3.88

0.0488

39.8%

0.66 (0.44–1.00)

 cB02

32

46

2.51

0.11

41.0%

0.70 (0.44–1.09)

 Others

20

20

1.00

1.00

50.0%

1.00 (0.54–1.86)

Tel haplotypes, age onset 14

 tA01

375

333

2.49

0.11

53.0%

1.13 (0.97–1.31)

 tA02

166

191

1.75

0.19

46.5%

0.87 (0.71–1.07)

 tB01

182

182

0.00

1.00

50.0%

1.00 (0.81–1.23)

 Others

45

62

2.70

0.10

42.1%

0.73 (0.49–1.07)

Tel haplotypes, age onset >14

 tA01

123

112

0.51

0.47

52.3%

1.10 (0.85–1.42)

 tA02

66

55

1.00

0.32

54.5%

1.20 (0.84–1.72)

 tB01

53

75

3.78

0.0518

41.4%

0.71 (0.50–1.00)

 Others

20

20

0.00

1.00

50.0%

1.00 (0.54–1.86)

  1. 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%.
  2. 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.
  3. cSignificant P-values (>0.05) are indicated with bold type. P-values are uncorrected based on prior hypothesis for KIR-T1D association.
  4. Trans, number of transmitted haplotypes; N-trans, number of untransmitted haplotypes.