Trends in age-adjusted prevalence of self-reported diabetes among women and men aged 40–84: the Tromsø Study 1994–2016
| Tromsø 4 | Tromsø 5 | Tromsø 6 | Tromsø 7 | OR (95% CI)* | P value | |
| Prevalence, % (n) | ||||||
| Women | N=8653 | N=4031 | N=6394 | N=10 551 | ||
| Total | 2.3 (227) | 2.8 (157) | 4.1 (295) | 4.6 (508) | 1.40 (1.31 to 1.49) | <0.001 |
| 40–49 years | 0.7 (22) | 1.1 (8) | 2.1 (40) | 3.0 (101) | 2.05 (1.68 to 2.50) | <0.001 |
| 50–59 years | 1.3 (29) | 2.0 (14) | 3.3 (44) | 3.7 (114) | 1.59 (1.32 to 1.90) | <0.001 |
| 60–69 years | 3.5 (58) | 3.8 (58) | 5.4 (109) | 6.0 (151) | 1.32 (1.15 to 1.51) | 0.001 |
| 70–84 years | 7.4 (118) | 7.1 (77) | 8.9 (102) | 9.5 (142) | 1.15 (1.02 to 1.29) | 0.019 |
| Men | N=8020 | N=3161 | N=5694 | N=9676 | ||
| Total | 2.4 (201) | 3.2 (142) | 5.1 (325) | 5.8 (583) | 1.52 (1.42 to 1.62) | <0.001 |
| 40–49 years† | 1.1 (37) | 1.7 (10) | 2.4 (39) | 2.7 (83) | 1.52 (1.27 to 1.82) | <0.001 |
| 50–59 years | 1.9 (42) | 3.7 (14) | 4.7 (55) | 5.1 (139) | 1.55 (1.33 to 1.80) | <0.001 |
| 60–69 years | 3.9 (57) | 4.8 (60) | 7.9 (151) | 8.0 (202) | 1.42 (1.25 to 1.61) | <0.001 |
| 70–84 years | 5.8 (65) | 6.5 (58) | 9.1 (80) | 10.8 (159) | 1.39 (1.22 to 1.59) | <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.
†Logistic regression used for age adjustment (GEE model did not converge).