Table 1—

General characteristics of the Yucheng cohort and their matched reference group aged ≥30 years in 1993

Men
Women
YuchengReference groupPYuchengReference groupP
n155152223218
Age in 1993 (years)59.6 ± 11.558.9 ± 11.5ns52.2 ± 10.651.6 ± 10.5ns
    <5562 (40.0)63 (41.5)155 (69.5)158 (72.5)
    55–6437 (23.9)40 (26.3)29 (13.0)26 (11.9)
    ≥6556 (36.1)49 (32.2)39 (17.5)34 (15.6)
BMI (kg/m2)24.1 ± 3.124.0 ± 3.1ns24.3 ± 8.523.5 ± 3.4ns
Education (years)7.2 ± 4.17.2 ± 3.7ns6.6 ± 4.17.3 ± 4.2ns
Current smoker85 (55.2)93 (62.0)ns2 (0.9)1 (0.5)ns
Alcohol drinking41 (26.8)34 (22.8)ns4 (1.8)1 (0.5)ns
Occupation
    None70 (45.2)59 (38.8)ns111 (49.8)92 (42.2)ns
    Government6 (3.9)4 (2.6)ns7 (3.1)8 (3.7)ns
    Agriculture12 (7.7)23 (15.1)ns5 (2.2)6 (2.8)ns
    Manufacturing54 (34.8)53 (34.9)ns69 (30.9)75 (34.4)ns
    Commercial13 (8.4)13 (8.6)ns31 (13.9)37 (17.0)ns
Serum PCBs (ppb)73.3 ± 86.31.67*87.4 ± 151.01.67*
  • Data are means ± SD or n (%).

  • * General population had mean serum PCB levels of 1.67 ppb wet weight as previously reported using a pooled sample from 50 reference subjects (ref. 16). ns, not significant.