Table 6.
Trend in estimated the China Dietary Guidelines Index (2018) total and component scores according to sample characteristics, from 1991 to 2015
| Characteristics | 1991 | 2000 | 2009 | 2015 | β | P-trend |
|---|---|---|---|---|---|---|
| Gender | ||||||
| Male | 41·1 | 42·4 | 48·0 | 51·7 | 0·464 | <0·01 |
| Female | 42·1 | 43·6 | 50·0 | 53·3 | 0·497 | <0·01 |
| P for interaction | <0·01 | |||||
| Age (years) | ||||||
| 18–44 | 41·3 | 42·9 | 49·1 | 52·4 | 0·480 | <0·01 |
| 45–59 | 42·5 | 42·9 | 48·6 | 52·7 | 0·473 | <0·01 |
| ≥59 | 42·6 | 44·1 | 49·6 | 52·7 | 0·464 | <0·01 |
| P for interaction | <0·01 | |||||
| Educational level | ||||||
| 0 | 40·7 | 42·1 | 47·5 | 50·4 | 0·418 | <0·01 |
| 1 | 41·8 | 43·1 | 48·9 | 52·0 | 0·459 | <0·01 |
| 2 | 45·1 | 45·1 | 51·8 | 55·0 | 0·486 | <0·01 |
| P for interaction | <0·01 | |||||
| Household income | ||||||
| Low | 38·9 | 41·1 | 47·1 | 49·9 | 0·482 | <0·01 |
| Middle | 41·8 | 42·9 | 49·0 | 53·1 | 0·501 | <0·01 |
| High | 44·2 | 45·1 | 50·9 | 54·6 | 0·464 | <0·01 |
| P for interaction | <0·01 | |||||
| Urbanicity index | ||||||
| Low | 38·3 | 40·2 | 45·5 | 48·6 | 0·446 | <0·01 |
| Middle | 40·8 | 42·9 | 49·1 | 52·8 | 0·530 | <0·01 |
| High | 45·8 | 46·0 | 52·4 | 56·1 | 0·471 | <0·01 |
| P for interaction | <0·01 | |||||
| Urban or rural | ||||||
| Urban | 44·6 | 45·4 | 51·6 | 55·4 | 0·492 | <0·01 |
| Rural | 40·3 | 41·8 | 47·7 | 50·7 | 0·463 | <0·01 |
| P for interaction | <0·01 | |||||