Table 1.

General characteristics of high and low TCDD-exposed workers

High-exposed (n = 47)Low-exposed (n = 38)P-valuef
Age, ya69.07 (7.45)68.55 (7.93)0.75
Body mass index (kg/m2)a27.33 (3.10)26.65 (3.04)0.31
Alcohol intake (units/week)a11.48 (13.56)17.26 (13.16)0.05
Smoking status, N (%)0.84
 Current smoker12 (25.5%)8 (21.1%)
 Former smoker28 (59.6)23 (60.5%)
 Never smoker7 (14.9%)7 (18.4%)
Skin cancer, N (%)4 (8.5%)3 (7.9%)0.92
Infectious disease in the past 4 weeks, N (%)4 (8.7%)4 (10.5%)0.78
Chronic disease, N (%)b24 (51.1%)20 (52.6%)0.89
Chronic inflammatory disease, N (%)c13 (27.7%)11 (28.9%)0.90
Medication, N (%)0.33
 Immunosuppressant5 (10.6%)4 (10.5%)
 NSAIDs14 (29.8%)6 (15.8%)
 Antibiotics01 (2.6%)
TCDDcurrent (ppt)d3.25 (7.43)1.07 (6.42)0.002
TCDDmax (ppt)e79.82 (33.28)7.53 (32.14)0.001

Abbreviation: NSAIDs, nonsteroidal anti-inflammatory drugs.

  • aMean (SD).

  • bChronic diseases included: diabetes, coronary heart disease, and hypertension.

  • cChronic inflammatory diseases: chronic obstructive pulmonary disease, psoriasis, sarcoidosis, asthmatic bronchitis, rheumatoid arthritis, liver failure, Crohn's disease, fibromyalgia, and allergy.

  • dCurrent levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDDcurrent) parts per trillion, geometric mean (geometric standard deviation).

  • eEstimated maximum levels of TCDD (TCDDmax) parts per trillion, geometric mean (geometric standard deviation).

  • fP values from t tests for continuous variables and χ2 tests for categorical variables.