Waist circumference-specific Incidence (cases/1000 person-years) of diabetes by sex and ethnicity
| Waist circumference | South Asians (SA) | Pima | Incidence rate ratio | Incidence risk difference | ||||
| South Asian cut-off | New cases | PYR | Incidence (95% CI)* | New cases | PYR | Incidence (95% CI)* | Pima vs South Asians (ref) | Pima vs South Asians |
| Men | ||||||||
| <90.0 | 78 | 7771 | 10.5 (8.1 to 12.8) | 5 | 739 | 6.9 (0.9 to 13.0) | 0.67 (0.21, 1.64) | −3.3 (−9.6, 3.1) |
| ≥90.0 | 107 | 4041 | 24.5 (19.7 to 29.3) | 171 | 4211 | 40.1 (34.0 to 46.2) | 1.53 (1.2, 1.97) | 14.1 (6.2, 22) |
| Women | ||||||||
| <80.0 | 54 | 7097 | 8.3 (6.1 to 10.5) | 3 | 254 | 13.2 (0.0 to 28.1) | 1.55 (0.31, 4.78) | 4.2 (−9.3, 17.7) |
| ≥80.0 | 209 | 8638 | 22.6 (19.5 to 25.7) | 305 | 7195 | 40.3 (35.5 to 45.0) | 1.75 (1.46, 2.1) | 18.2 (12.4, 24) |
| Europids cut-off | ||||||||
| Men | ||||||||
| <94.0 | 96 | 9069 | 10.9 (8.7 to 13.1) | 11 | 1050 | 10.7 (4.4 to 17.1) | 0.99 (0.48, 1.85) | −0.1 (−6.7, 6.4) |
| ≥94.0 | 89 | 2743 | 29.8 (23.4 to 36.2) | 165 | 3900 | 41.7 (35.2 to 48.2) | 1.3 (1, 1.71) | 9.9 (0.5, 19.2) |
| Women | ||||||||
| <80.0 | 54 | 7097 | 8.3 (6.1 to 10.5) | 3 | 254 | 13.2 (0.0 to 28.1) | 1.55 (0.31, 4.78) | 4.2 (−9.3, 17.7) |
| ≥80.0 | 209 | 8638 | 22.6 (19.5 to 25.7) | 305 | 7195 | 40.3 (35.5 to 45.0) | 1.75 (1.46, 2.1) | 18.2 (12.4, 24) |
| In the USA, the ATP III values | ||||||||
| Men | ||||||||
| <102.0 | 137 | 10 869 | 12.7 (10.6 to 14.9) | 32 | 2015 | 15.9 (10.4 to 21.4) | 1.26 (0.83, 1.86) | 3.3 (−2.6, 9.2) |
| ≥102.0 | 48 | 943 | 45.1 (31.9 to 58.2) | 144 | 2935 | 48.3 (40.3 to 56.3) | 0.96 (0.69, 1.37) | −1.8 (−18.3, 14.6) |
| Women | ||||||||
| <88.0 | 125 | 11 218 | 11.6 (9.6 to 13.7) | 9 | 744 | 12.9 (4.5 to 21.3) | 1.09 (0.49, 2.13) | 1.00 (−7.2, 9.1) |
| ≥88.0 | 138 | 4518 | 27.4 (22.8 to 32.1) | 299 | 6705 | 42.3 (37.3 to 47.4) | 1.46 (1.19, 1.8) | 14.0 (6.9, 21.2) |
IRR (ratio of incidence rates) calculated as Pima (incidence rate) divided by SA (incidence rate). Incidence risk difference (IRD, risk difference, cases/1000 person years) calculated as Pima (incidence rate) minus SA (incidence rate).
Incidence rate ratio and incidence risk difference calculated from crude incidence rates.
Diabetes defined as FPG≥ 7.00 mmol/L (126 mg/dL) or HbA1c ≥ 48 mmol/mol (6.5 %) or self-reported/physician diagnosed diabetes or medication.
*Age adjusted; PYR-person years; ref-reference category; vs-Versus.
ATP, Adult Treatment Panel; FPG, fasting plasma glucose; IRD, incidence risk difference; IRR, incidence rate ratio; PYR, person year.