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

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

	Population mean^a	Consumer mean^b	Number of consumers	Quartile of blood mercury level^a				P for trend
				Q1	Q2	Q3	Q4
Intake levels from 24-h recall (g/day)
Total fish^c	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 seafood^d	17.9	42.8	1452	13.7	16.9	17.9	23.2	<0.001
Intake levels from FFQ (n/week)
Total fish^e	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

^aMean consumption (includes that of non-consumers) of fish and seafood. Total intake level of each food item divided by total N.
^bMean consumption (including only consumers) of fish and seafood. Total intake level of each food item divided by consumer N.
^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).
^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).
^eSum of the frequency of consumption of mackerel, tuna (fresh and canned), yellow corvina, pollock, anchovy, and fish paste.

ISSN: 1471-2458