Table 1

Demographic and clinical characteristics by time period: Gila River Indian Community, 1975–2004

1975–19771978–19801981–19831984–19861987–19891990–19921993–19951996–19981999–20012002–2004P trend
n459452462492480632623464575775
% of clinic attendees with diabetes35323133323534303334
Clinical diagnosis (%)64535046464747464850
Male sex (%)343735333336343233370.98
Age (years)51.6 (14.1)50.0 (13.8)50.6 (14.3)49.7 (13.5)49.5 (13.2)50.4 (12.6)51.2 (13.1)46.3 (13.1)45.8 (13.0)45.1 (13.0)<0.0001*
Diabetes duration (years)9.5 (6.1)9.8 (6.2)10.9 (6.7)11.5 (6.9)12.4 (7.4)12.7 (8.1)13.0 (8.7)11.0 (8.2)11.0 (8.3)11.4 (8.5)<0.0001
Age at diagnosis (years)42.0 (12.7)40.2 (12.3)39.7 (12.5)38.1 (11.7)37.0 (11.6)37.7 (11.3)38.2 (11.4)35.3 (11.0)34.8 (11.0)33.6 (11.4)<0.0001
BMI (kg/m2)30.6 (6.5)30.7 (6.2)30.8 (6.5)32.1 (6.9)32.4 (7.0)32.8 (7.2)33.3 (7.8)34.9 (8.5)36.0 (8.6)36.3 (9.1)<0.0001
  • Except for the second row, all results pertain only to persons with diagnosed diabetes. Data are means ± SD in parentheses or frequency (%). Clinical diagnosis refers to a diagnosis of diabetes made during routine clinical care rather than at a research examination (i.e., those without a clinical diagnosis had the diagnosis made at a previous research examination). P values computed for time period. For frequencies, P values are from χ2 tests; for continuous variables, P values are computed by regression.

  • *Adjusted for sex;

  • †adjusted for age and sex;

  • ‡adjusted for age, sex, and diabetes duration.