Table 3.
Age-standardized prevalence of central obesity* among Chinese adults with BMI < 23 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 |
7.6 (0.4) |
5346 |
7.6 (0.4) |
5281 |
10.2 (0.4) |
4722 |
12.1 (0.5) |
4485 |
11.5 (0.5) |
4597 |
13.5 (0.6) |
< 0.001 |
|
| Men |
2538 |
2.5 (0.3) |
2695 |
2.2 (0.3) |
2652 |
4.5 (0.4) |
2274 |
5.8 (0.5) |
2119 |
4.3 (0.5) |
2160 |
4.9 (0.5) |
< 0.001 |
0.49 |
| Women |
2522 |
13.0 (0.7) |
2651 |
13.3 (0.7) |
2629 |
16.1 (0.8) |
2448 |
18.2 (0.9) |
2366 |
18.1 (0.9) |
2437 |
21.2 (0.9) |
< 0.001 |
|
| Age (years) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 18-44 |
3228 |
4.9 (0.4) |
3202 |
5.4 (0.4) |
2941 |
7.6 (0.5) |
2229 |
9.3 (0.6) |
2054 |
8.9 (0.7) |
1948 |
9.6 (0.7) |
< 0.001 |
0.18 |
| 45-64 |
1351 |
11.1 (0.9) |
1515 |
10.4 (0.8) |
1665 |
13.0 (0.9) |
1727 |
15.6 (1.0) |
1629 |
14.6 (1.0) |
1770 |
18.3 (1.0) |
< 0.001 |
|
| 65-118 |
481 |
15.7 (1.8) |
629 |
14.6 (1.5) |
675 |
19.3 (1.7) |
766 |
21.1 (1.7) |
802 |
20.8 (1.6) |
879 |
26.0 (1.7) |
< 0.001 |
|
| Region |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Urban |
1407 |
10.5 (0.9) |
1694 |
7.6 (0.7) |
1640 |
10.8 (0.8) |
1497 |
12.3 (0.9) |
1432 |
12.3 (1.0) |
1461 |
13.0 (1.0) |
< 0.001 |
< 0.0001 |
| Rural |
3653 |
6.2 (0.4) |
3652 |
7.2 (0.4) |
3641 |
9.4 (0.5) |
3225 |
11.5 (0.6) |
3053 |
10.6 (0.6) |
3136 |
12.9 (0.7) |
< 0.001 |
|
| Education |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Less than high school |
4226 |
8.3 (0.5) |
4347 |
8.3 (0.4) |
4162 |
10.4 (0.5) |
3690 |
12.6 (0.6) |
3411 |
11.7 (0.6) |
3441 |
14.3 (0.7) |
< 0.001 |
0.73 |
| High school |
706 |
6.2 (1.2) |
827 |
5.6 (0.9) |
895 |
10.3 (1.1) |
595 |
12.1 (1.6) |
588 |
10.9 (1.5) |
582 |
12.1 (1.8) |
< 0.001 |
|
| University | 128 | 8.0 (2.5) | 172 | 6.8 (2.0) | 224 | 8.8 (2.0) | 437 | 9.7 (1.5) | 486 | 11.5 (1.5) | 574 | 11.6 (1.4) | < 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.