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Table 2 Blood cadmium concentrations by gejang (marinated crab) intake frequency and amount (unweighted and weighted)

From: The association between blood cadmium level, frequency and amount of gejang (marinated crab) intake

  Unweighted Weighted
Characteristics Male Female Total Male Female Total
  Numbera Cdb Numbera Cdb Numbera Cdb Numberc Cdb Numberc Cdb Numberc Cdb
Frequency             
 Rarely 514 0.85 ± 0.03 670 1.04 ± 0.02 1184 0.96 ± 0.02 12,548,740 0.84 ± 0.03 14,304,696 1.07 ± 0.03 26,853,437 0.96 ± 0.02
 1/month 72 1.02 ± 0.15 59 1.08 ± 0.08 131 1.05 ± 0.09 1,788,377 1.00 ± 0.12 1,345,577 1.14 ± 0.09 3,133,955 1.06 ± 0.08
 2–3/month 29 0.94 ± 0.08 17 1.12 ± 0.13 46 1.00 ± 0.07 735,207 0.95 ± 0.09 269,466 1.07 ± 0.13 1,004,674 0.98 ± 0.08
 1/week 11 1.06 ± 0.18 4 1.40 ± 0.17 15 1.15 ± 0.14 218,089 1.03 ± 0.16 65,181 1.44 ± 0.15 283,271 1.13 ± 0.14
 2–4/week - - 3 1.09 ± 0.11 3 1.09 ± 0.11 - - 43,525 1.15 ± 0.01 43,525 1.15 ± 0.01
 5–6/week 1 1.82 1 2.26 2 2.04 ± 0.22 13,692 1.82 30,364 2.26 44,056 2.12 ± 0.13
p-value*   0.217   0.340   0.149   <0.001   <0.001   <0.001
Intake per meal             
 Rarely 514 0.85 ± 0.03 670 1.04 ± 0.02 1184 0.96 ± 0.02 12,548,740 0.84 ± 0.03 14,304,696 1.07 ± 0.03 26,853,437 0.96 ± 0.02
 5 cm3 5 0.61 ± 0.10 6 1.22 ± 0.24 11 0.94 ± 0.16 91,884 0.63 ± 0.10 124,635 1.30 ± 0.18 216,520 1.02 ± 0.17
 15 cm3 36 1.11 ± 0.30 25 1.16 ± 0.12 61 1.13 ± 0.18 914,111 1.04 ± 0.22 514,450 1.30 ± 0.16 1,428,562 1.13 ± 0.15
 50 cm3 72 0.99 ± 0.06 53 1.09 ± 0.07 125 1.03 ± 0.05 1,749,370 0.99 ± 0.07 1,115,030 1.08 ± 0.08 2,864,400 1.02 ± 0.05
p-value*   0.099   0.689   0.212   <0.001   <0.001   <0.001
Intake per month             
 Rarely 514 0.85 ± 0.03 670 1.04 ± 0.02 1184 0.96 ± 0.02 12,548,740 0.84 ± 0.03 14,304,696 1.07 ± 0.03 26,853,437 0.96 ± 0.02
  ≤ 100 cm3 82 0.99 ± 0.14 66 1.11 ± 0.07 148 1.04 ± 0.08 2,032,772 0.96 ± 0.11 1,446,455 1.15 ± 0.08 3,479,227 1.04 ± 0.07
 101–200 cm3 30 1.04 ± 0.09 16 1.09 ± 0.09 46 1.05 ± 0.07 708,902 1.05 ± 0.08 250,769 1.06 ± 0.11 959,672 1.06 ± 0.06
  > 200 cm3 1 1.82 2 1.71 ± 0.55 3 1.75 ± 0.32 13,692 1.82 56,890 1.75 ± 0.39 70,583 1.76 ± 0.31
p-value*   0.137   0.384   0.088   <0.001   <0.001   <0.001
  1. aNumber of consumers of 6th Korea National Health and Nutritional Examination Survey (KNHANES) per individual category
  2. bBlood cadmium concentrations were expressed as mean ± standard error, unit: μg/L
  3. cEstimated number of the Korean population per individual category
  4. *Calculated by ANCOVA
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