Table 1—

Prevalence of diagnosed diabetes, undiagnosed diabetes, and NNTS according to 1985 WHO criteria and 1997 ADA criteria, stratified by race and sex

Total (n = 2,950)White (n = 1,732)
Black (n = 1,218)
Men (n = 913)Women (n = 819)Men (n = 528)Women (n = 690)
Diagnosed diabetes460 (15.6)127 (13.9)64 (7.8)120 (22.7)149 (21.6)
1985 WHO criteria
 Undiagnosed diabetes235 (8.0)83 (9.1)61 (7.4)48 (9.1)43 (6.2)
 Total diabetes prevalence*695 (23.6)210 (23.0)125 (15.3)168 (31.8)192 (27.6)
 NNTS§10.69.512.48.512.6
1997 ADA criteria
 Undiagnosed diabetes106 (3.6)47 (5.1)12 (1.5)28 (5.3)19 (2.8)
 Total diabetes prevalence*566 (19.2)174 (19.1)76 (9.3)148 (28.0)168 (24.3)
 NNTS23.516.762.914.628.5
  • Data are n (%).

  • *

    * Undiagnosed plus diagnosed diabetes;

  • participants who reported prior diagnosis by a physician;

  • participants who met diabetes criteria but responded “no” to the question “Has a doctor ever told you that you have diabetes?”;

  • §

    § NNTS smaller in all subgroups compared with ADA criteria;

  • P < 0.05 versus white and black women;

  • P < 0.05 versus white women.