|  | Control | Case | Unadjusted | Adjusteda | ||||
---|---|---|---|---|---|---|---|---|---|
 |  |  |  | OR | 95% CI | P | OR | 95% CI | P |
Owns pet27 | No | 681 | 754 | 1 | Â | 0.0056 | Â | Â | 0.093 |
 | Yes | 1017 | 939 | 0.816 | 0.707 – 0.942 |  | 0.836 | 0.678 – 1.030 |  |
Shares WC | No | 1584 | 1565 | 1 | Â | 0.260 | Â | Â | Â |
 | Yes | 91 | 103 | 1.185 | 0.882 – 1.593 |  |  |  |  |
Shares kitchen | No | 1581 | 1557 | 1 | Â | 0.294 | Â | Â | Â |
 | Yes | 80 | 89 | 1.350 | 0.863 – 1.630 |  |  |  |  |
Length of work surface | < 1 m | 91 | 94 | 1.152 | 0.834 – 1.592 |  | 1.143 | 0.703 – 1.860 |  |
 | 1 – 2 m | 588 | 625 | 1.178 | 1.014 – 1.369 |  | 1.221 | 0.981 – 1.520 |  |
 | > 2 m | 934 | 824 | 1 |  | 0.045 | 1 |  | 0.115 |
Owns fridge | No | 79 | 89 | 1.153 | 0.841 – 1.581 |  |  |  |  |
 | Yes | 1612 | 1608 | 1 |  | 0.377 |  |  |  |
Owns freezer | No | 75 | 111 | 1.479 | 1.094 – 1.999 |  | 1.219 | 0.761 – 1.951 |  |
 | Yes | 1617 | 1586 | 1 |  | 0.011 | 1 |  | 0.411 |
Owns dishwasher | No | 1172 | 1224 | 1.172 | 1.004 – 1.368 |  | 1.178 | 0.932 – 1.487 |  |
 | Yes | 520 | 473 | 1 |  | 0.045 | 1 |  | 0.170 |
Soak nappies in kitchen | No | 1657 | 1666 | 1 | Â | 0.638 | Â | Â | Â |
 | Yes | 10 | 8 | 0.800 | 0.316 – 2.027 |  |  |  |  |
Shop frequency | >1 per week | 410 | 504 | 1 | Â | 0.649 | Â | Â | Â |
 | 1 per week | 1070 | 920 | 0.697 | 0.591 – 0.821 |  |  |  |  |
 | 1 per 2 weeks | 124 | 155 | 1.009 | 0.763 – 1.334 |  |  |  |  |
 | 1 per month | 65 | 92 | 1.112 | 0.778 – 1.590 |  |  |  |  |
 | Less often | 6 | 4 | 0.521 | 0.145 – 1.869 |  |  |  |  |
Checks use by date | Always | 1312 | 1378 | 1 | Â | 0.002 | 1 | Â | 0.214 |
 | Sometimes | 321 | 229 | 0.696 | 0.575 – 0.843 |  | 0.792 | 0.596 – 1.051 |  |
 | Never | 22 | 20 | 0.996 | 0.531 – 1.870 |  | 1.106 | 0.453 – 2.700 |  |
Follows storage instructions | Always | 1208 | 1282 | 1 |  | 3.3 × 10-4 | 1 |  | 0.020 |
 | Sometimes | 386 | 306 | 0.719 | 0.602 – 0.859 |  | 0.721 | 0.556 – 0.933 |  |
 | Never | 30 | 23 | 0.940 | 0.597 – 1.482 |  | 0.803 | 0.383 – 1.682 |  |
Check packaging for damage when shopping | Always | 1363 | 1349 | 1 | Â | 0.753 | Â | Â | Â |
 | Sometimes | 261 | 247 | 0.940 | 0.772 – 1.144 |  |  |  |  |
 | Never | 15 | 17 | 1.197 | 0.589 – 2.433 |  |  |  |  |
Pack frozen food together in cool container for transport | Always | 364 | 430 | 1 | Â | 0.049 | 1 | Â | 0.312 |
 | Sometimes | 456 | 380 | 0.697 | 0.569 – 0.853 |  | 0.713 | 0.527 – 0.965 |  |
 | Never | 791 | 751 | 0.804 | 0.671 – 0.963 |  | 1.060 | 0.812 – 1.382 |  |
Check appearance of product when shopping | Always | 1456 | 1420 | 1 | Â | 0.572 | Â | Â | Â |
 | Sometimes | 180 | 181 | 1.034 | 0.825 – 1.295 |  |  |  |  |
 | Never | 8 | 12 | 1.375 | 0.553 – 3.418 |  |  |  |  |
Stores meat in fridge | On bottom shelf | 964 | 868 | 1 | Â | 0.0007 | 1 | Â | 0.0009 |
 | Anywhere else | 740 | 837 | 1.269 | 1.106 – 1.457 |  | 1.419 | 1.155 – 1.742 |  |
Use separate chopping board for raw and cooked meats | No | 807 | 688 | 0.769 | 0.663 – 0.893 |  | 0.803 | 0.648 – 0.994 |  |
 | Yes | 801 | 871 | 1 |  | 0.0006 | 1 |  | 0.044 |
Use separate chopping board for other raw and cooked foods | No | 999 | 860 | 0.772 | 0.664 – 0.897 |  | 0.741 | 0.599 – 0.919 |  |
 | Yes | 607 | 677 | 1 |  | 0.0007 | 1 |  | 0.006 |
Cleans chopping board between raw and cooked foods | No | 52 | 55 | 1.064 | 0.714 – 1.584 |  |  |  |  |
 | Yes | 1570 | 1496 | 1 |  | 0.761 |  |  |  |
Uses same cloth for wiping all surfaces in kitchen | No | 810 | 789 | 1 | Â | 0.884 | Â | Â | Â |
 | Yes | 854 | 848 | 1.011 | 0.876 – 1.165 |  |  |  |  |
Normally cools foods | In fridge | 597 | 716 | 1 |  | 2.0 × 10-7 | 1 |  | b |
 | In larder | 77 | 83 | 0.938 | 0.657 – 1.339 |  | 0.651 | 0.388 – 1.093 |  |
 | On work surface | 874 | 717 | 0.634 | 0.536 – 0.749 |  | 0.704 | 0.552 – 0.897 |  |
Normally stores foods for eating later | In fridge | 1549 | 492 | 1 | Â | 0.334 | Â | Â | Â |
 | In larder | 16 | 15 | 1.097 | 0.500 – 2.405 |  |  |  |  |
 | On work surface | 43 | 56 | 1.360 | 0.900 – 2.057 |  |  |  |  |