Table 1.
Descriptive statistics of study population including all participants with 10 year follow-up, free of prevalent diabetes at baseline and with complete data. Vӓsterbotten Intervention Programme 1990–2013
| BMI at baseline (kg/m2) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| <25.0 | 25.0–29.9 | 30.0–34.9 | ≥35.0 | Total | ||||||
| Total (n, %)a | 18,332 | 55.2 | 11,900 | 35.9 | 2,447 | 7.4 | 505 | 1.5 | 33,184 | 100.0 |
| Age at baseline, years (n, %)a | ||||||||||
| 30 | 3,161 | 65.6 | 1,345 | 27.9 | 257 | 5.3 | 57 | 1.2 | 4,820 | 100.0 |
| 40 | 8,137 | 58.0 | 4,700 | 33.5 | 972 | 6.9 | 214 | 1.5 | 14,023 | 100.0 |
| 50 | 7,034 | 49.0 | 5,855 | 40.8 | 1,218 | 8.5 | 234 | 1.6 | 14,341 | 100.0 |
| Sex (n, %)a | ||||||||||
| Men | 7,186 | 46.5 | 6,986 | 45.2 | 1,147 | 7.4 | 140 | 0.9 | 15,459 | 100.0 |
| Women | 11,146 | 62.9 | 4,914 | 27.7 | 1,300 | 7.3 | 365 | 2.1 | 17,725 | 100.0 |
| BMI at baseline, kg/m2 (mean, SD) | 22.5 | 1.7 | 26.9 | 1.3 | 31.8 | 1.3 | 37.9 | 3.0 | 25.0 | 3.6 |
| BMI at 10 year follow-up, kg/m2 (mean, SD) | 23.9 | 2.4 | 28.2 | 2.5 | 33.1 | 3.2 | 39.0 | 5.0 | 26.3 | 4.1 |
| Change in BMI between baseline and 10 year follow-up, Δkg/m2 (mean, SD) | +1.4 | 1.8 | +1.2 | 2.2 | +1.3 | 2.9 | +1.1 | 4.5 | +1.3 | 2.1 |
| Relative weight change between baseline and 10 year follow-up, as % of baseline weight (mean, SD) | +5.5 | 8.1 | +3.8 | 8.0 | +3.3 | 9.1 | +2.3 | 11.5 | +4.7 | 8.3 |
| Baseline capillary plasma glucose concentration, mmol/L (mean, SD) | ||||||||||
| Fasting | 5.2 | 0.6 | 5.4 | 0.6 | 5.4 | 0.6 | 5.5 | 0.7 | 5.3 | 0.6 |
| 2-h value | 6.3 | 1.2 | 6.4 | 1.3 | 6.6 | 1.5 | 6.9 | 1.4 | 6.4 | 1.3 |
| IGT (n, %) | ||||||||||
| At baseline | 354 | 1.9 | 363 | 3.1 | 142 | 5.8 | 35 | 6.9 | 894 | 2.7 |
| At 10 year follow-up | 900 | 4.9 | 966 | 8.1 | 304 | 12.4 | 70 | 13.9 | 2,240 | 6.8 |
| IFG (n, %) | ||||||||||
| At baseline | 763 | 4.2 | 910 | 7.6 | 236 | 9.6 | 69 | 13.7 | 1,978 | 6.0 |
| At 10 year follow-up | 1,641 | 9.0 | 1,414 | 11.9 | 338 | 13.8 | 81 | 16.0 | 3,474 | 10.5 |
| Year at baseline (n, %)a | ||||||||||
| 1990–1994 | 7,479 | 60.3 | 4,014 | 32.4 | 771 | 6.2 | 144 | 1.2 | 12,408 | 100.0 |
| 1995–1999 | 8,173 | 53.2 | 5,765 | 37.5 | 1,177 | 7.7 | 248 | 1.6 | 15,363 | 100.0 |
| 2000–2003 | 2,680 | 49.5 | 2,121 | 39.2 | 499 | 9.2 | 113 | 2.1 | 5,413 | 100.0 |
| Education (n, %) | ||||||||||
| Primary | 6,435 | 35.1 | 5,226 | 43.9 | 1,163 | 47.5 | 260 | 51.5 | 13,084 | 39.4 |
| Any secondary | 6,436 | 35.1 | 4,037 | 33.9 | 838 | 34.2 | 170 | 33.7 | 11,481 | 34.6 |
| Any tertiary | 5,461 | 29.8 | 2,637 | 22.2 | 446 | 18.2 | 75 | 14.9 | 8,619 | 26.0 |
| Marital status at baseline (n, %) | ||||||||||
| Single/Widowed/Divorced | 2,951 | 16.1 | 1,867 | 15.7 | 413 | 16.9 | 109 | 21.6 | 5,340 | 16.1 |
| Married/Partner | 15,381 | 83.9 | 10,033 | 84.3 | 2,034 | 83.1 | 396 | 78.4 | 27,844 | 83.9 |
| Family history of diabetes (n, %) | 2,699 | 14.7 | 2,284 | 19.2 | 585 | 23.9 | 116 | 23.0 | 5,684 | 17.1 |
| Tobacco use at baseline (n, %) | 5,839 | 31.9 | 4,033 | 33.9 | 782 | 32.0 | 135 | 26.7 | 10,789 | 32.5 |
| Current smokers | 4,017 | 21.9 | 2,469 | 20.7 | 498 | 20.4 | 102 | 20.2 | 7,086 | 21.4 |
| Current snuff users | 2,380 | 13.0 | 2,094 | 17.6 | 383 | 15.7 | 45 | 8.9 | 4,902 | 14.8 |
Percentages calculated in the column except where otherwise indicated
Diabetes, IGT and IFG based on OGTT
BMI Body mass index, IFG Impaired Fasting Glycaemia, IGT Impaired Glucose Tolerance, OGTT Oral glucose tolerance test, SD Standard deviation
aPercentages calculated across the row