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Table 6 Results of logistic regression analysis(PCQ blood levelas an objective variable)

From: Association of clinical findings in Yusho patients with serum concentrations of polychlorinated biphenyls, polychlorinated quarterphenyls and 2,3,4,7,8-pentachlorodibenzofuran more than 30 years after the poisoning event

Explanatory variables which showed less than 0.10 level of significance when PCQ blood level (2 categories) and the factors selected by the principal components analysis were used as objective variables and explanatory variables, respectively.
  Explanatory variables β Standard deviation Wald Significance probability Exp (B)
1 2,3,4,7,8-PeCDF blood level 0.040 0.010 16.276 0.00005** 1.041
2 Tooth pigmentation 6.737 2.073 10.564 0.00115** 843.324
3 Arthralgia -3.082 1.138 7.337 0.00675** 0.046
4 γ-GTP (increase) -0.065 0.024 7.132 0.00757** 0.937
5 Total bilirubin (decrease) 3.282 1.384 5.626 0.01769** 26.621
6 Cheesy secretion from meibomian glands -7.612 3.230 5.554 0.01844** 0.000
7 General fatigue 2.983 1.273 5.497 0.01905** 19.756
8 Total cholesterol (increase) 0.042 0.018 5.260 0.02182** 1.043
9 Pigmentation (toe nails) -3.974 1.906 4.348 0.03705** 0.019
10 Gender (female) -2.227 1.111 4.015 0.04509** 0.108
11 Pigmentation of the right buccal mucosa (band-like) -7.584 3.846 3.889 0.04860** 0.001
12 Acneform eruptions (other sites) 8.124 4.436 3.354 0.06705* 3372.941
13 Headache -1.901 1.116 2.903 0.08842* 0.149
Explanatory variables which showed less than 0.10 level of significance when 2,3,4,7,8-PeCDF blood level was excluded from the explanatory variables in the above analysis
  Explanatory variables β Standard deviation Wald Significance probability Exp (B)
1 Past history of pigmentation 3.117 0.989 9.932 0.00162** 22.588
2 Tooth pigmentation 3.929 1.260 9.727 0.00182** 50.869
3 PCB blood level 0.437 0.156 7.842 0.00510** 1.547
4 Acneform eruptions (trunk) -3.260 1.297 6.318 0.01195** 0.038
5 Abdominal pain -1.779 0.781 5.184 0.02280** 0.169
6 Pigmentation (face) 4.678 2.105 4.937 0.02629** 107.516
7 Total cholesterol (increase) 0.021 0.010 4.310 0.03790** 1.021
8 Acneform eruptions (other sites) 3.613 2.003 3.252 0.07132* 37.059
9 Pigmentation of the upper lip (patchy) 3.161 1.830 2.984 0.08407* 23.590
10 γ-GTP (increase) -0.021 0.013 2.721 0.09901* 0.980
  1. * P < 0.10, ** P < 0.05