Table 5 Results of logistic regression analysis (PCB blood level as an objective variable)
Explanatory variables that showed less than 0.10 level of significance when the PCB blood level (2 categories) and 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 | 0.012 | 0.003 | 15.412 | 0.00009** | 1.012 |
2 | Sputum | -2.818 | 0.855 | 10.876 | 0.00097** | 0.060 |
3 | Age (old) | 0.129 | 0.039 | 10.834 | 0.00100** | 1.137 |
4 | Past history of pigmentation | -3.832 | 1.167 | 10.783 | 0.00102** | 0.022 |
5 | Gender (female) | -1.986 | 0.693 | 8.220 | 0.00414** | 0.137 |
6 | Past history of acneform eruptions | 2.785 | 1.023 | 7.409 | 0.00649** | 16.202 |
7 | Pigmentation (toe nails) | -1.907 | 0.750 | 6.472 | 0.01096** | 0.149 |
8 | Hepatomegaly | -7.627 | 3.134 | 5.920 | 0.01497** | 0.000 |
9 | Headache | -1.554 | 0.704 | 4.871 | 0.02732** | 0.211 |
10 | Cheesy secretion from meibomian glands | 2.623 | 1.248 | 4.414 | 0.03564** | 13.773 |
11 | Total bilirubin (increase) | -1.611 | 0.770 | 4.372 | 0.03654** | 0.200 |
12 | General fatigue | 1.374 | 0.676 | 4.138 | 0.04194** | 3.951 |
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 | Age (old) | 0.115 | 0.033 | 11.920 | 0.00056** | 1.121 |
2 | Sputum | -2.040 | 0.663 | 9.473 | 0.00208** | 0.130 |
3 | Past history of pigmentation | -2.432 | 0.958 | 6.440 | 0.01116** | 0.088 |
4 | Total bilirubin (decrease) | -1.701 | 0.686 | 6.145 | 0.01318** | 0.182 |
5 | PCQ blood level | 1.142 | 0.480 | 5.654 | 0.01742** | 3.134 |
6 | Pigmentation (toe nails) | -1.418 | 0.621 | 5.213 | 0.02242** | 0.242 |
7 | Arthralgia | -4.886 | 2.357 | 4.299 | 0.03814** | 0.008 |
8 | Presence of a chief dental complaint | 1.544 | 0.748 | 4.263 | 0.03896** | 4.682 |
9 | Headache | -1.276 | 0.624 | 4.179 | 0.04093** | 0.279 |
10 | Cheesy secretion from meibomian glands | 2.616 | 1.291 | 4.110 | 0.04264** | 13.682 |
11 | Past history of acneform eruptions | 1.650 | 0.853 | 3.743 | 0.05304* | 5.205 |
12 | Black comedones | -3.569 | 2.086 | 2.926 | 0.08716* | 0.028 |
13 | Mean corpuscular volume (increase) | -0.080 | 0.047 | 2.847 | 0.09154* | 0.923 |
14 | Urinalysis protein (increase) | -0.619 | 0.372 | 2.771 | 0.09600* | 0.539 |