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Table 4 Levels of fish and shellfish consumption in a participant sample (n = 3972) from the KNHANES (2008–2009) according to blood mercury levels

From: Population correlates of circulating mercury levels in Korean adults: the Korea National Health and Nutrition Examination Survey IV

  Population meana Consumer meanb Number of consumers Quartile of blood mercury levela P for trend
     Q1 Q2 Q3 Q4  
Intake levels from 24-h recall (g/day)         
Total fishc 41.4 58.7 2458 32.9 39.4 43.8 50.0 <0.001
White fish 14.4 65.2 770 10.7 12.9 16.3 17.9 <0.001
Oily/fatty fish 17.3 31.5 1909 13.8 16.6 18.0 21.0 <0.001
Other fish 9.7 46.1 735 8.3 9.9 9.5 11.2 0.08
Shellfish and other seafoodd 17.9 42.8 1452 13.7 16.9 17.9 23.2 <0.001
Intake levels from FFQ (n/week)         
Total fishe 5.1 5.1 3382 4.4 5.2 5.2 5.6 <0.001
White fish (yellow corvina, pollock) 1.1 1.2 3088 0.8 1.0 1.1 1.3 <0.001
Oily/fatty fish (mackerel, anchovy) 2.9 3.0 3306 2.5 3.0 2.9 3.2 <0.001
Other fish (tuna, fish paste) 1.1 1.9 2759 1.05 1.14 1.14 1.09 0.8
Shellfish and other seafood (squid, clam, pickled seafood) 1.7 1.9 3127 1.3 1.6 1.9 2.1 <0.001
  1. aMean consumption (includes that of non-consumers) of fish and seafood. Total intake level of each food item divided by total N.
  2. bMean consumption (including only consumers) of fish and seafood. Total intake level of each food item divided by consumer N.
  3. cSum of the intake of top 22 fish types (anchovy, fish paste, pollock, mackerel, yellow corvina, tuna (canned), cutlassfish, pacific saury, eel, tuna (fresh only), halibut, skate, rockfish, filefish, cod, loach, salmon, flounder, sea bream, Spanish mackerel, monk fish, and arabesque greenling).
  4. dSum of the intake of shellfish and other seafood (clam, crawfish, crab, whelk, oyster, shrimp, conch, abalone, mussel, squid, octopus, jellyfish, sea cucumber, sea squirt, fish intestine, salted seafood).
  5. eSum of the frequency of consumption of mackerel, tuna (fresh and canned), yellow corvina, pollock, anchovy, and fish paste.