Table 3 —

Unadjusted prevalence of depression in controlled and uncontrolled studies and subsets thereof

Grouping of studiesControlled studies
Diabetic subjects: uncontrolled studiesDiabetic subjects: controlled + uncontrolled studies
Nondiabetic subjectsDiabetic subjects
All studies11.4 (18)20.5 (18)*29.7 (21)25.3 (39)
 Type 18.6 (3)21.7 (3)*21.2 (10)21.3 (13)
 Type 26.4 (7)16.5 (7)*33.8 (8)27.0 (15)
 Male9.3 (7)15.0 (7)*20.7 (8)18.0 (15)
 Female16.3 (7)24.3 (7)*33.0 (8)28.2 (15)
 Community12.7 (11)19.0 (11)*39.7 (1)20.1 (12)
 Clinic15.1 (7)26.7 (7)*32.7 (19)31.7 (26)
 Diagnostic interview5.0 (7)9.0 (7)*14.2 (7)11.4 (14)
 Self-report14.4 (11)26.1 (11)*34.9 (14)31.0 (25)
  • Data are % (n); n indicates number of studies used in the calculation.

  • *

    * The prevalence of depression was greater in diabetic subjects compared with nondiabetic control subjects (P < .001);

  • the prevalence of depression in diabetic individuals was greater in uncontrolled studies compared with controlled studies (P < 0.05).