Table 2

Age-adjusted prevalence of total diabetes and proportion of undiagnosed diabetes among women and men aged 40–84: the Tromsø Study 1994–2016

Tromsø 4Tromsø 5Tromsø 6Tromsø 7OR (95% CI)*P value
Prevalence, % (n)
WomenN=2976N=3342N=6059N=10 334
Total diabetes†3.2 (120)5.1 (244)6.0 (388)5.9 (593)1.24 (1.16 to 1.33)<0.001
 Undiagnosed‡32.3 (32)41.8 (96)31.8 (117)17.2 (102)0.55 (0.47 to 0.66)<0.001
MenN=2895N=2445N=5416N=9504
Total diabetes†3.7 (132)6.6 (242)7.8 (440)7.9 (746)1.31 (1.22 to 1.40)<0.001
 Undiagnosed‡36.5 (38)51.4 (121)35.2 (142)24.2 (178)0.60 (0.52 to 0.70)<0.001
  • Proportions, ORs with CIs and p value for trend are adjusted for age across surveys using generalised estimating equation (GEE) models. N represents crude numbers.

  • *ORs for proportions are presented per 10 years.

  • †Total diabetes: self-reported diabetes or HbA1c ≥6.5%.

  • ‡Undiagnosed: proportion of those without self-reported diabetes but HbA1c ≥6.5% among those with diabetes.

  • HbA1c, glycated haemoglobin.