Anthropometric change from the baseline
| From baseline to Survey 2004* | From baseline to Survey 2008† | |||||||
| Women (n=4811) | Men (n=3062) | Women vs men | Total (n=7873) | Women (n=11 374) | Men (n=6644) | Women vs men | Total (n=18 018) | |
| Mean (SD)‡ | Mean (SD)‡ | P value§ | Mean (SD)‡ | Mean (SD)‡ | Mean (SD)‡ | P value§ | Mean (SD)‡ | |
| Absolute change‡ | ||||||||
| ∆weight | ||||||||
| kg | 0.34 (5.23) | 0.33 (5.87) | 0.94 | 0.34 (5.63) | 0.58 (6.07) | 0.53 (6.35) | 0.6 | 0.55 (6.24) |
| ∆BMI | ||||||||
| kg/m2 | 0.13 (2.24) | 0.09 (1.75) | 0.40 | 0.11 (2.06) | 0.27 (2.44) | 0.22 (2.02) | 0.15 | 0.25 (2.29) |
| ∆WC | ||||||||
| cm | 1.17 (6.59) | 0.64 (5.97) | <0.001 | 0.96 (6.36) | 1.31 (6.65) | 0.49 (6.34) | <0.001 | 1.01 (6.55) |
| ∆WHR | ||||||||
| Ratio | 0.008 (0.05) | 0.004 (0.06) | 0.001 | 0.007 (0.06) | 0.014 (0.06) | 0.007 (0.06) | <0.001 | 0.011 (0.06) |
| Relative change‡ | ||||||||
| ∆weight% | ||||||||
| % | 0.71 (7.19) | 0.51 (5.48) | 0.19 | 0.63 (6.58) | 0.99 (7.89) | 0.79 (6.24) | 0.08 | 0.92 (7.32) |
| ∆BMI% | ||||||||
| % | 0.73 (7.36) | 0.46 (5.69) | 0.08 | 0.63 (6.76) | 1.25 (8.11) | 0.91 (6.50) | 0.004 | 1.13 (7.56) |
| ∆WC% | ||||||||
| % | 1.61 (7.14) | 0.80 (5.90) | <0.001 | 1.30 (6.70) | 1.77 (7.38) | 0.68 (6.23) | <0.001 | 1.37 (6.99) |
| ∆WHR% | ||||||||
| % | 1.20 (6.08) | 0.59 (6.61) | <0.001 | 0.96 (6.30) | 1.86 (6.47) | 0.88 (6.39) | <0.001 | 1.50 (6.46) |
| Relative change (by categories) | ||||||||
| ∆weight% | Proportion (%) | Proportion (%) | P value | Proportion (%) | Proportion (%) | Proportion (%) | P value | Proportion (%) |
| >5% loss | 16.3 | 11.9 | <0.001 | 14.6 | 16.3 | 12.5 | <0.001 | 14.9 |
| ±5% | 62.4 | 72.8 | <0.001 | 66.4 | 60.3 | 68.7 | <0.001 | 63.4 |
| >5% gain | 21.3 | 15.3 | <0.001 | 19.0 | 23.4 | 18.8 | <0.001 | 21.7 |
| ∆BMI% | ||||||||
| >5% loss | 16.7 | 12.8 | <0.001 | 15.2 | 16.3 | 13.0 | <0.001 | 15.1 |
| ±5% | 60.7 | 70.8 | <0.001 | 64.6 | 57.9 | 66.1 | <0.001 | 60.9 |
| >5% gain | 22.6 | 16.4 | <0.001 | 20.2 | 25.8 | 20.9 | <0.001 | 24.0 |
| ∆WC% | ||||||||
| >5% loss | 13.5 | 13.0 | 0.5 | 13.3 | 14.2 | 14.4 | 0.7 | 14.3 |
| ±5% | 60.5 | 67.8 | <0.001 | 63.3 | 57.5 | 65.3 | <0.001 | 60.4 |
| >5% gain | 26.0 | 19.2 | <0.001 | 23.4 | 28.3 | 20.3 | <0.001 | 25.3 |
| ∆WHR% | ||||||||
| >5% loss | 10.9 | 12.6 | 0.02 | 11.6 | 9.3 | 12.2 | <0.001 | 10.4 |
| ±5% | 68.6 | 70.7 | 0.05 | 69.4 | 66.0 | 70.0 | <0.001 | 67.4 |
| >5% gain | 20.5 | 16.7 | <0.001 | 19.0 | 24.7 | 17.8 | <0.001 | 22.2 |
*Average follow-up time between baseline and completion of follow-up questionnaire Survey 2004 was 2.5±0.3 years.
†Average follow-up time between baseline and completion of follow-up questionnaire Survey 2008 was 4.2±2.2 years.
‡The average absolute (or relative) change in anthropometrics was calculated by the following steps: (i) for each participant, the absolute change was calculated by subtracting the baseline measure from the follow-up measure; (ii) for each participant, the relative change was calculated as the percentage of the absolute change (calculated in step #1) from baseline, that is, relative change=absolute change *100/baseline measure; (iii) the mean (average) of absolute changes and relative changes in anthropometrics by (sum(absolute or relative changes)/total number (n) of participants who had completed the follow-up questionnaires).
§Student t-test and χ2 test were used to compare women and men.
BMI, body mass index; WC, waist circumference; WHR, waist-hip-ratio.