Prevalence of each body mass index (BMI) category in women of childbearing age during 2010–2012 in total
| BMI category (kg/m2) | 2010–2012 | 2010 | 2011 | 2012 | p Value* |
|---|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | ||
| <18.5 | 261 671 (13.21%) | 31 649 (10.40%) | 115 863 (13.32%) | 114 159 (14.14%) | <0.0001 |
| 18.5–23.9 | 1 454 678 (73.42%) | 233 100 (76.60%) | 633 325 (72.81%) | 588 253 (72.88%) | <0.0001 |
| 24–27.9 | 217 864 (11.00%) | 32 435 (10.66%) | 99 445 (11.43%) | 85 984 (10.65%) | <0.0001 |
| ≥28 | 47 012 (2.37%) | 7123 (2.34%) | 21 154 (2.43%) | 18 735 (2.32%) | <0.0001 |
| Total | 1 981 225 (100%) | 304 307 (15.36%) | 869 787 (43.90%) | 807 131 (40.74%) | <0.0001 |
| Mean BMI | 21.225 | 21.311 | 21.255 | 21.159 | <0.0001 |
| (95% CI) | (21.221 to 21.228) | (21.301 to 21.320) | (21.249 to 21.261) | (21.153 to 21.165) | <0.0001 |
*χ2 test for comparing the prevalence of each BMI category in different years.