Table 1 —

Demographic profile of study population (Allegheny County Registry, U.S., 1965–79)

Sex
Race
Year at onset
Total
MaleFemaleCaucasianAfrican-American1965–19691970–19741975–1979
n558517995793533913311,075
Living status confirmed (%)502 (90.0)470 (90.9)906 (91.1)65 (82.3)320 (90.7)355 (90.8)297 (89.7)972 (90.4)
Male (%)558 (100)524 (52.7)34 (43.0)178 (50.4)213 (54.5)167 (50.4)559 (52.0)
Caucasian (%)524 (93.9)471 (91.1)955 (100)326 (92.4)366 (92.4)303 (91.5)996 (92.7)
Year at onset1971.9 ± 4.11971.8 ± 4.11971.9 ± 4.11971.8 ± 441967.2 ± 1.41972.0 ± 1.41976.8 ± 1.51971.9 ± 4.1
Age at onset11.0 ± 4.310.8 ± 4.010.9 ± 4.211.4 ± 4.310.6 ± 4.410.7 ± 4.111.5 ± 4.010.8 ± 4.2
Mean duration of diabetes25.5 ± 5.024.9 ± 6.225.3 ± 5.623.6 ± 6.428.7 ± 6.225.2 ± 4.921.3 ± 2.625.2 ± 5.8
Person-years of follow-up14,188.2512,904.725,199.841,872.610,184.99,878.27,029.827,092.9
  • Data are means ± SD, unless otherwise indicated. Age at onset for the subjects diagnosed between 1975–1979 was significantly higher than those of 1965–1969 and 1970–1974 by Tukey’s multiple comparison of analysis of variance (P = 0.01).