Table 1

Weighted estimates of overall and sex-specific prevalence of undiagnosed and total type 2 diabetes among adult Canadians (20+ years of age) according to different diagnostic criteria

Diagnostic criteriaTotal diabetes (diagnosed and undiagnosed) (%)Undiagnosed diabetes (%)
OverallMalesFemalesOverallMalesFemales
FPG (≥7.0 mmol/L)5.62 (4.52, 6.95)6.49 (4.80, 8.73)4.74 (3.46, 6.47)1.13 (0.79, 1.62)1.40 (0.87, 2.24)0.87 (0.41, 1.85)
HbA1c (≥6.5% and ≥48 mmol/mol)7.55 (5.98, 9.49)8.04 (5.63, 11.35)7.07 (5.31, 9.34)3.09 (1.97, 4.81)*2.94 (1.48, 5.79)3.24 (1.98, 5.24)*
FPG or HbA1c7.74 (6.19, 9.64)3.38 (2.26, 5.04)*
  • Data are reported as prevalence (95% CI). –, not provided due to small cell size. Note: The undiagnosed diabetes prevalence denominator excludes individuals with self-reported diabetes. Therefore, the difference between the total diabetes prevalence and the undiagnosed diabetes prevalence does not equal the diagnosed diabetes prevalence (i.e., the diagnosed diabetes prevalence is the number of diabetes cases divided by the total sample population, whereas the undiagnosed diabetes prevalence is the number of undiagnosed diabetes cases divided by the total sample minus the number of self-reported diabetes cases. Scaled prediabetes estimates (i.e., estimates using the same denominator) are available in Supplementary Table 1.

  • *Significantly different (P < 0.05) compared with the FPG-only criterion; no statistically significant differences in sex-specific prevalence estimates were observed.