Table 2.
Distribution of BMI and waist circumference by perceived stress quintiles among adults in the China Health and Nutrition Survey 2015 (n 8385)
| All adults | Perceived stress* | P value† | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quintile 1 | Quintile 2 | Quintile 3 | Quintile 4 | Quintile 5 | ||||||||||
| (n 1728) | (n 1690) | (n 1531) | (n 1317) | (n 2119) | ||||||||||
| n | % | n | % | n | % | n | % | n | % | n | % | |||
| BMI (kg/m2)‡ | Mean (sd) | 24·3 (3·6) | 24·7 (3·7) | 24·3 (3·6) | 24·2 (3·5) | 24·2 (3·7) | 24·2 (3·6) | <0·001 | ||||||
| WHO BMI categories§,‖ | 0·013 | |||||||||||||
| Underweight | 343 | 4·1 | 55 | 3·2 | 61 | 3·6 | 68 | 4·4 | 68 | 5·2 | 91 | 4·3 | ||
| Overweight | 2889 | 34·5 | 626 | 36·2 | 568 | 33·6 | 519 | 33·9 | 470 | 35·7 | 706 | 33·3 | ||
| Obesity | 500 | 6·0 | 127 | 7·4 | 106 | 6·3 | 79 | 5·2 | 64 | 4·9 | 124 | 5·9 | ||
| Chinese-specific BMI categories¶ | 0·078 | |||||||||||||
| Underweight | 343 | 4·1 | 55 | 3·2 | 61 | 3·6 | 68 | 4·4 | 68 | 5·2 | 91 | 4·3 | ||
| Overweight | 3028 | 36·1 | 656 | 38·0 | 590 | 34·9 | 540 | 35·3 | 478 | 36·3 | 764 | 36·1 | ||
| Obesity | 1215 | 14·5 | 276 | 16·0 | 253 | 15·0 | 219 | 14·3 | 176 | 13·4 | 291 | 13·7 | ||
| WHO waist circumference categories**,†† | 0·370 | |||||||||||||
| Moderate abdominal obesity | 1971 | 23·5 | 418 | 24·2 | 404 | 23·9 | 369 | 24·1 | 307 | 23·3 | 473 | 22·3 | ||
| Abdominal obesity | 1608 | 19·2 | 357 | 20·7 | 323 | 19·1 | 298 | 19·5 | 239 | 18·2 | 391 | 18·5 | ||
| Chinese-specific waist circumference categories‡‡ | 0·013 | |||||||||||||
| Moderate abdominal obesity | 1603 | 19·1 | 331 | 19·2 | 321 | 19·0 | 292 | 19·1 | 226 | 17·2 | 433 | 20·4 | ||
| Abdominal obesity | 3575 | 42·6 | 786 | 45·5 | 723 | 42·8 | 656 | 42·9 | 574 | 43·6 | 836 | 39·5 | ||
Cut-points for categorical perceived stress: quintile 1: 0–17; quintile 2: 18–22; quintile 3: 23–25; quintile 4: 26–27 and quintile 5: 28–52.
P value is for ANOVA of continuous BMI, for chi-square test of categorical BMI and for chi2 test of categorical waist circumference.
Mean (sd) was reported for continuous BMI.
WHO cut-points for BMI: underweight, <18·5 kg/m2; normal weight, 18·5–24·9 kg/m2; overweight but not obese, 25·0–29·9 kg/m2 and obese, ≥30·0 kg/m2.
Per cent of normal weight category is omitted for it can be calculated by: 100 %–underweight %–overweight but not obese %–obese %.
Chinese-specific cut-points for BMI: underweight, <18·5 kg/m2; normal weight, 18·5–23·9 kg/m2; overweight but not obese, 24·0–27·9 kg/m2 and obese, ≥28·0 kg/m2
Per cent of normal waist circumference is omitted for it can be calculated by: 100 % minus the per cents of two kinds of elevated waist circumference.
WHO cut-points for waist circumference: moderate abdominal obesity is defined as >94 cm and ≤102 cm for male and >80 cm and ≤88 cm for female, while abdominal obesity is defined as >102 cm for male and >88 cm for female.
Chinese-specific cut-points for waist circumference: moderate abdominal obesity is defined as ≥85 cm and <90 cm for male and ≥80 cm and <85 m for female, while abdominal obesity is defined as ≥90 cm for male and ≥85 for female.