Table 1. Demographic and clinical characteristics in study subjects.
| Subjectsn (%) | Femalen (%) | Age years Mean (SD) | |
| Population | 252 | 144 (57.1) | 42.4 (15.3) |
| Race/Ethnicity | |||
| Caucasian | 207 (82.1) | 109 (53.4) | 43.8 (15.4) |
| African-American | 16 (6.3) | 12 (66.7) | 37.3 (10) |
| Hispanic/Latino | 2 (0.8) | 1 (50) | 28 (14.1) |
| Asian | 4 (1.6) | 3 (75) | 33.5 (19.1) |
| Other/missing | 23 (9.1) | 19 (13.2) | 35.7 (11) |
| Vascular risk factors | |||
| Heart disease | 80 (31.7) | 45 (31.3) | 43.3 (15.2) |
| Smoking | 146 (57.9) | 35 (24.3) | 41.9 (15.4) |
| Hypertension | 64 (25.4) | 29 (20.1) | 48.6 (14.9) |
| Obesity | 56 (22.2) | 34 (23.6) | 46 (13.5) |
| Habits | |||
| Alcohol | 204 (81) | 112 (54.9) | 44.2 (13.7) |
| Dietary supplements | 144 (57.1) | 90 (62.5) | 44.4 (15.04) |
| Herbal supplements | 39 (15.5) | 26 (66.7) | 41.8 (12.6) |
| Physical activity | 168 (66.7) | 87 (60.4) | 40.6 (15.9) |
| Autoimmune diseases | |||
| Rheumatoid disorders | 8 (3.2) | 4 (50) | 52.1 (7.1) |
| Psoriasis | 6 (2.4) | 4 (66.6) | 49.2 (17.3) |
| Diabetes Mellitus Type 1 | 5 (2) | 3 (60) | 51.5 (5.2) |
| Other diseases | |||
| Asthma | 32 (12.7) | 22 (68.7) | 43.7 (16.6) |
| Allergy | 90 (35.7) | 62 (68.8) | 42.6 (15.7) |
| Cancer | 14 (5.7) | 7 (50) | 53.7 (6.4) |
| COPD | 9 (3.6) | 7 (77.7) | 52 (11.9) |
| Irritable bowel syndrome | 19 (7.5) | 11 (57.9) | 45.9 (12.06) |
| Migraine | 40 (15.9) | 28 (70) | 42.4 (13.5) |
Legend: COPD – chronic obstructive pulmonary disease.
The various environmental factor frequencies were calculated on the total population of 252 subjects. Data for missing cases were conservatively categorized as negative.