Table 2

Characteristics of the 1,794 Japanese subjects used in the association tests

Stage 1 samples (discovery panel)
Cases (n = 372)
Controls (n = 360)

Gender (M/F)
188/184
148/212
Age
64.4 ± 10.3
46.3 ± 19.9
HbA1C (%)
7.39 ± 1.48
4.79 ± 0.36
BMI (kg/m2)
23.7 ± 3.5
22.0 ± 2.9
Age at onset < 50 (%)
175 (47.0)
-
          ≥50(%)
195 (52.5)
-
          unknown (%)
2 (0.5)
-
Family history (%)
125 (33.6)
-
     Diabetes in both parents
11

     Diabetes in one parent
110

     Diabetes in son or daughter
4

Insulin therapy (+) (%)
112 (30.1)
-

Stage 2 samples (replication panel)
Cases (n = 532)
Controls (n = 530)

Gender (M/F)
246/286
284/246
Age
62.0 ± 10.7
37.8 ± 11.3
HbA1C (%)
7.47 ± 1.43
4.88 ± 0.33
BMI (kg/m2)
23.6 ± 3.3
22.4 ± 3.0
Age at onset < 50 (%)
244 (45.9)
-
          ≥50(%)
287 (53.9)
-
          unknown (%)
1 (0.2)
-
Family history (%)
207 (38.9)
-
     Diabetes in both parents
22

     Diabetes in one parent
180

     Diabetes in son or daughter
5

Insulin therapy (+) (%)
172 (32.3)
-

Stage 1 + Stage 2 combined samples
Cases (n = 904)
Controls (n = 890)

Gender (M/F)
434/470
432/458
Age
63.0 ± 10.6
41.2 ± 15.9
HbA1C (%)
7.43 ± 1.45
4.84 ± 0.34
BMI (kg/m2)
23.6 ± 3.4
22.3 ± 3.0
Age at onset < 50 (%)
419 (46.4)
-
          ≥50(%)
482 (53.3)
-
          unknown (%)
3 (0.3)
-
Family history (%)
332 (36.7)
-
     Diabetes in both parents
33

     Diabetes in one parent
290

     Diabetes in son or daughter
9

Insulin therapy (+) (%)
284 (31.4)
-

Yamaguchi et al. BMC Medical Genetics 2008 9:22   doi:10.1186/1471-2350-9-22