Table 2

Age-specific incidence of diabetes (cases/1000 PYR) by sex and ethnicity

Age categories (years)South Asians (SA)US blacksUS whitesSouth Asians versus US whites (ref)US blacks versus US whites (ref)
New casesPYRIncidence (95% CI)
Per 1000 PYR
New casesPYRIncidence (95% CI)
Per 1000 PY
New casesPYRIncidence (95% CI)
Per 1000 PYR
IRRIRDIRRIRD
Men
45–4964235227.2
(21.3 to 34.8)
73279126.2
(20.8 to 32.9)
128861614.9
(12.5 to 17.7)
1.83
(1.34 to 2.49)
12.4
(5.2 to 19.5)
1.76
(1.30 to 2.36)
11.3
(4.8 to 17.8)
50–5439158024.7
(18.0 to 33.8)
56210526.6
(20.5 to 34.6)
155941916.5
(14.1 to 19.3)
1.50
(1.03 to 2.14)
8.2
(0.10 to 16.4)
1.62
(1.17 to 2.21)
10.1
(2.7 to 17.6)
55–593498534.5
(24.7 to 48.3)
49168629.1
(22.0 to 38.5)
163937117.4
(14.9 to 20.3)
1.98
(1.33 to 2.89)
17.1
(5.2 to 29.0)
1.67
(1.19 to 2.31)
11.7
(3.1 to 20.2)
≥6046202322.7
(17.0 to 30.4)
38152025.0
(18.2 to 34.4)
137850916.1
(13.6 to 19.0)
1.41
(0.99 to 1.99)
6.6
(−0.5 to 13.7)
1.55
(1.05 to 2.24)
8.9
(0.5 to 17.3)
Total (crude)183693926.4
(22.8 to 30.5)
216810226.7
(23.3 to 30.5)
58335 91416.2
(15.0 to 17.6)
1.62
(1.37 to 1.92)
10.1
(6.1 to 14.2)
1.64
(1.40 to 1.92)
10.4
(6.6 to 14.2)
Total (age standardised*)26.0
(22.2 to 29.8)
26.2
(22.7 to 29.7)
16.1
(14.8 to 17.4)
Women
45–4992248637.0
(30.2 to 45.4)
114495223.0
(19.2 to 27.7)
10612 1208.7
(7.2 to 10.6)
4.23
(3.17 to 5.65)
28.3
(20.5 to 36.0)
2.63
(2.00 to 3.46)
14.3
(9.7 to 18.8)
50–5439140027.8
(20.3 to 38.1)
112379629.5
(24.5 to 35.5)
11411 6179.8
(8.2 to 11.8)
2.84
(1.92 to 4.12)
18.0
(9.1 to 27.0)
3.01
(2.30 to 3.94)
19.7
(13.9 to 25.4)
55–593391636.0
(25.6 to 50.7)
84271930.9
(24.9 to 38.3)
12410 14912.2
(10.2 to 14.6)
2.95
(1.95 to 4.36)
23.8
(11.3 to 36.3)
2.53
(1.89 to 3.36)
18.7
(11.7 to 25.6)
≥6042142629.5
(21.8 to 39.9)
62205030.2
(23.6 to 38.8)
109849412.8
(10.6 to 15.5)
2.3
(1.57 to 3.3)
16.6
(7.4 to 25.8)
2.36
(1.70 to 3.25)
17.4
(9.5 to 25.3)
Total (crude)206622833.1
(28.9 to 37.9)
37213 51627.5
(24.9 to 30.5)
45342 38010.7
(9.7 to 11.7)
3.09
(2.61 to 3.66)
22.4
(17.8 to 27.0)
2.57
(2.24 to 2.96)
16.8
(13.9 to 19.8)
Total (age standardised*)31.9
(27.5 to 36.2)
28.6
(25.7 to 31.6)
11.3
(10.2 to 12.3)
Both sexes
Total (crude)38913 16729.5
(26.7 to 32.6)
58821 61827.2
(25.1 to 29.5)
103678 29413.2
(12.5 to 14.1)
3.19
(2.87 to 3.53)
28.9
(25.3 to 32.5)
2.06
(1.85 to 2.28)
14
(11.6 to 16.3)
Total (age standardised*)28.7
(25.8 to 31.5)
27.6
(25.4 to 29.9)
13.5
(12.7 to 14.3)
  • Diabetes defined as FPG ≥7.0 mmol/L (126 mg/dL) or HBA1c ≥48 mmol/mol (6.5%) or self-reported/physician-diagnosed diabetes or medication.

  • IRR calculated as South Asians/US blacks (incidence rate) divided by US whites (incidence rate).

  • IRD, (risk difference, cases/1000 PYR) calculated as South Asians/US blacks (incidence rate) minus US whites (incidence rate).

  • *Standardised to world population.

  • FPG, fasting plasma glucose; HbA1c, hemoglobin A1c; IRD, incidence risk difference; IRR, incidence rate ratio; PYR, person-years; ref, reference.