Table 1.
Descriptive statistics by Dietary Inflammatory Index (DII) quintile
| DII Q1 | DII Q2 | DII Q3 | DII Q4 | DII Q5 | Total | Test statistics | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | n | % | n | % | n | % | ||
| Quintile median | −2·9 | −1·9 | −1·0 | −0·1 | 1·8 | −0·9 | P < 0·001* | ||||||
| IQR | −3·3, −2·7 | −2·2, −1·7 | −1·2, −0·7 | −0·2, 0·4 | 1·3, 2·6 | −2·1, 0·5 | |||||||
| Age | |||||||||||||
| <50 years | 1764 | 33·3 | 1951 | 35·2 | 2001 | 36·1 | 2110 | 37·2 | 2078 | 37·2 | 9904 | 35·6 | χ 2 = 48·4; df = 8, P < 0·001 |
| 50–59 years | 1726 | 32·6 | 1872 | 33·8 | 1847 | 33·3 | 1955 | 34·4 | 1960 | 34·2 | 9360 | 33·7 | |
| ≥60 years | 1808 | 34·1 | 1716 | 31·0 | 1701 | 30·7 | 1615 | 28·4 | 1700 | 26·9 | 8540 | 30·7 | |
| Mean | 55·0 | 54·4 | 54·3 | 53·9 | 54·1 | 54·3 | P < 0·001* | ||||||
| sd | 8·7 | 8·6 | 8·6 | 8·5 | 8·4 | 8·6 | |||||||
| Gender | |||||||||||||
| Male | 2295 | 43·2 | 2201 | 39·7 | 2166 | 39·0 | 2238 | 39·4 | 2130 | 37·1 | 11 030 | 39·7 | χ 2 = 46·2; df = 4, P < 0·001 |
| Female | 3003 | 56·7 | 3338 | 60·3 | 3383 | 61·0 | 3442 | 60·6 | 3608 | 62·9 | 16 774 | 60·3 | |
| SEIFA quintiles | |||||||||||||
| SEIFA Q1 | 813 | 15·5 | 842 | 15·3 | 897 | 16·2 | 1042 | 18·4 | 1253 | 21·9 | 4847 | 17·5 | χ 2 = 372; df = 16, P < 0·001 |
| SEIFA Q2 | 928 | 17·7 | 1072 | 19·5 | 1120 | 20·3 | 1257 | 22·2 | 1404 | 24·6 | 5781 | 20·9 | |
| SEIFA Q3 | 802 | 15·3 | 875 | 15·9 | 877 | 15·9 | 884 | 15·6 | 973 | 17·0 | 4411 | 16·0 | |
| SEIFA Q4 | 1023 | 19·5 | 1097 | 20·0 | 1041 | 18·9 | 1016 | 18·0 | 924 | 16·2 | 5101 | 18·5 | |
| SEIFA Q5 | 1686 | 32·1 | 1613 | 29·3 | 1589 | 28·8 | 1453 | 25·7 | 1158 | 20·3 | 7499 | 27·1 | |
| Country of birth | |||||||||||||
| AU/NZ/Other | 4100 | 77·4 | 4023 | 72·6 | 3886 | 70·0 | 3603 | 63·4 | 2910 | 50·7 | 18 522 | 66·6 | χ 2 = 1400; df = 8, P < 0·001 |
| UK | 410 | 7·7 | 407 | 7·4 | 352 | 6·3 | 347 | 6·1 | 317 | 5·5 | 1833 | 6·6 | |
| Southern Europe | 788 | 14·9 | 1109 | 20·0 | 1311 | 23·6 | 1730 | 30·5 | 2511 | 43·8 | 7449 | 26·8 | |
| Smoking status | |||||||||||||
| Never | 3207 | 60·5 | 3457 | 62·4 | 3289 | 59·3 | 3301 | 58·1 | 3302 | 57·6 | 16 556 | 59·6 | χ 2 = 230; df = 8, P < 0·001 |
| Former | 1631 | 30·8 | 1605 | 29·0 | 1657 | 29·9 | 1678 | 29·5 | 1508 | 26·3 | 8079 | 29·1 | |
| Current | 459 | 8·7 | 477 | 8·6 | 603 | 10·9 | 701 | 12·3 | 928 | 16·2 | 3168 | 11·4 | |
| Alcohol dinking status | |||||||||||||
| Never | 1521 | 29·0 | 1503 | 27·4 | 1473 | 26·8 | 1606 | 28·6 | 1761 | 31·2 | 7864 | 28·6 | χ 2 = 36; df = 8, P < 0·001 |
| Former | 537 | 10·3 | 558 | 10·2 | 579 | 10·5 | 557 | 9·9 | 596 | 10·5 | 2827 | 10·3 | |
| Current | 3180 | 60·7 | 3431 | 62·5 | 3452 | 62·7 | 3461 | 61·5 | 3295 | 58·3 | 16 819 | 61·1 | |
| Physical activity score | |||||||||||||
| 0 | 829 | 15·7 | 1031 | 18·6 | 1161 | 20·9 | 1478 | 26·0 | 1793 | 31·3 | 6292 | 22·6 | χ 2 = 755; df = 12, P < 0·0001 |
| >0 and <4 | 981 | 18·5 | 1077 | 19·4 | 1146 | 20·7 | 1189 | 20·9 | 1235 | 21·5 | 5628 | 20·2 | |
| ≥4 and <6 | 1886 | 35·6 | 2008 | 36·3 | 1950 | 35·1 | 1871 | 32·9 | 1881 | 32·8 | 9596 | 34·5 | |
| ≥6 | 1602 | 30·2 | 1423 | 25·7 | 1292 | 23·3 | 1142 | 20·1 | 829 | 14·8 | 6288 | 22·6 | |
| WHR at baseline | |||||||||||||
| Normal WHR | 3664 | 69·2 | 3806 | 68·7 | 3747 | 67·6 | 3720 | 65·6 | 3583 | 62·5 | 18 520 | 66·7 | χ 2 = 75; df = 4, P < 0·001 |
| Raised WHR | 1633 | 30·8 | 1732 | 31·3 | 1795 | 32·4 | 1955 | 34·5 | 2149 | 37·5 | 9264 | 33·3 | |
| Mean | 0·83 | 0·83 | 0·83 | 0·84 | 0·84 | 0·84 | P < 0·001* | ||||||
| sd | 0·1 | 0·1 | 0·1 | 0·1 | 0·1 | 0·1 | |||||||
| BMI at baseline | |||||||||||||
| <25 | 2302 | 43·5 | 2323 | 42·0 | 2124 | 38·3 | 2019 | 35·6 | 1771 | 30·9 | 10 539 | 37·9 | χ 2 = 331; df = 8, P < 0·001 |
| 25–29·9 | 2205 | 41·6 | 2335 | 42·2 | 2388 | 43·1 | 2507 | 44·2 | 2556 | 44·6 | 11 991 | 43·2 | |
| ≥30·0 | 791 | 14·9 | 878 | 15·9 | 1033 | 18·6 | 1149 | 20·3 | 1407 | 24·5 | 5258 | 18·9 | |
| Mean | 26·1 | 26·3 | 26·6 | 26·9 | 27·5 | 26·7 | P < 0·001* | ||||||
| sd | 4·0 | 4·1 | 4·2 | 4·3 | 4·5 | 4·3 | |||||||
| Energy (kJ/d) | |||||||||||||
| Mean | 12 888 | 10 341 | 9109 | 8031 | 6299 | 9274 | P < 0·0001* | ||||||
| sd | 4983 | 2742 | 2406 | 2129 | 1877 | 3729 | |||||||
IQR, interquartile range; SEIFA, Socio-Economic Indexes for Areas; WHR, waist-to-hip circumference ratio.
*
P for trend.