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The contamination rate of seafood 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 | 96 | 28 | 124 | 1 | 1.04 | 1 | 3.57 | 2 | 1.61 | 0.40 |
| 2011 | 160 | 34 | 194 | 15 | 9.36 | 9 | 26.47 | 24 | 12.37 | 0.02 |
| 2012 | 182 | 141 | 323 | 47 | 25.82 | 37 | 26.24 | 84 | 26.01 | 1.00 |
| 2013 | 119 | 89 | 208 | 12 | 10.08 | 21 | 23.6 | 33 | 15.87 | 0.00 |
| Total | 557 | 292 | 849 | 75 | 13.91 | 68 | 21.94 | 143 | 16.84 | 0.00 |
