Beta cell function

0 - 9

10 - 19

20 - 29

>29

β + ve

72

18

6

2.0

β − ve

40

32

22

6.0

β − ve/β + ve

0.55

1.8^*

3.6^†

3.0^†

RR ± CI^‡

3.3 ± 0.39^†

6.5 ± 0.84^†

5.7 ± 0.68^†