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The contamination rate of cooked meat in different markets in Shandong Province from 2010 to 2013
| Years | Super markets | Farmer’s markets | Total | Contaminated samples | P-value | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Supermarkets | Farmer’s markets | Total | ||||||||
| number | (%) | number | (%) | number | (%) | |||||
| 2010 | 140 | 26 | 166 | 10 | 7.14 | 5 | 19.23 | 15 | 9.04 | 0.06 |
| 2011 | 146 | 31 | 177 | 6 | 4.11 | 7 | 22.58 | 13 | 7.34 | 0.00 |
| 2012 | 429 | 193 | 622 | 18 | 4.20 | 31 | 16.06 | 49 | 7.88 | 0.00 |
| 2013 | 366 | 125 | 491 | 6 | 1.64 | 10 | 8.00 | 16 | 3.26 | 0.00 |
| Total | 1081 | 375 | 1456 | 40 | 3.70 | 53 | 14.13 | 93 | 6.39 | 0.00 |
