Table 2

Age-standardized prevalence of central obesity* among Chinese adults with BMI < 25 kg/m2
1993 1997 2000 2004 2006 2009 P for trend P
n % (SE) n % (SE) n % (SE) n % (SE) n % (SE) n % (SE)
Total 5060 11.9 (0.4) 5346 12.2 (0.4) 5281 15.8 (0.4) 4722 18.2 (0.5) 4485 18.6 (0.5) 4597 21.1 (0.5) < 0.001
Men 2538 4.4 (0.4) 2695 4.6 (0.4) 2652 7.7 (0.4) 2274 10.1 (0.5) 2119 8.9 (0.5) 2160 10.4 (0.5) < 0.001 0.042
Women 2522 19.3 (0.7) 2651 19.8 (0.7) 2629 23.8 (0.7) 2448 26.0 (0.8) 2366 27.4 (0.8) 2437 30.9 (0.8) < 0.001
Age (years)
  18-44 3228 7.7 (0.4) 3202 8.4 (0.4) 2941 11.0 (0.5) 2229 13.5 (0.6) 2054 13.6 (0.7) 1948 15.1 (0.7) < 0.001 0.003
  45-64 1351 17.7 (0.9) 1515 17.7 (0.8) 1665 22.3 (0.8) 1727 24.9 (0.9) 1629 25.5 (0.9) 1770 34.9 (0.9) < 0.001
  65-118 481 23.1 (1.7) 629 22.2 (1.5) 675 29.8 (1.5) 766 30.2 (1.4) 802 32.0 (1.4) 879 35.3 (1.4) < 0.001
Region
  Urban 1407 15.7 (0.9) 1694 12.7 (0.7) 1640 16.3 (0.8) 1497 18.4 (0.8) 1432 19.8 (0.9) 1461 20.8 (0.9) < 0.001 < 0.001
  Rural 3653 9.6 (0.4) 3652 11.3 (0.5) 3641 14.7 (0.5) 3225 17.2 (0.6) 3053 17.1 (0.6) 3136 20.1 (0.6) < 0.001
Education
  Less than high school 4226 12.8 (0.5) 4347 13.0 (0.5) 4162 16.5 (0.5) 3690 19.0 (0.6) 3411 18.9 (0.6) 3441 22.4 (0.6) < 0.001 0.67
  High school 706 9.3 (1.0) 827 10.0 (0.9) 895 14.8 (1.0) 595 17.3 (1.3) 588 17.5 (1.3) 582 19.6 (1.4) < 0.001
  University 128 10.5 (2.3) 172 11.1 (2.1) 224 12.2 (1.9) 437 14.5 (1.4) 486 17.0 (1.4) 574 16.4 (1.3) < 0.001

SE, standard error.

* Central obesity is defined as waist circumference ≥ 90 cm for men and ≥ 80 cm for women.

Trends in the prevalence of central obesity from 1993 to 2009 were assessed by Cochran-Armitage trend testing.

P for interaction terms (survey × sex, survey × age, survey × rural/urban settings, and survey × education group) were assessed by logistic regression analysis.

Du et al.

Du et al. BMC Public Health 2013 13:327   doi:10.1186/1471-2458-13-327

Open Data