Table 1. Baseline characteristics of glioma cases and controls1.
| Controls | Cases | P-value2 | |
|---|---|---|---|
| N | 64 | 64 | |
| Age at blood draw, years | 58 | 57 | Matched |
| Median time from serum collection to diagnosis (years, interdecile range) | — | 9.0 (3.0-20.0) | — |
| Height (cm) | 173.9 | 174.4 | 0.93 |
| Weight (kg) | 80.2 | 77.0 | 0.069 |
| BMI (kg/ m2) | 26.5 | 25.3 | 0.025 |
| History of diabetes (%) | 7.8 | 3.1 | 0.24 |
| Cigarettes per day | 21.1 | 20.2 | 0.45 |
| Years of cigarette smoking | 36.5 | 35.4 | 0.57 |
| Physically active (%) | 18.8 | 23.4 | 0.67 |
| Serum retinol (μg/ L) | 592.3 | 586.4 | 0.76 |
| Serum total cholesterol (mmol/ L) | 6.2 | 6.2 | 0.70 |
| Serum α-tocopherol (mg/ L) | 12.0 | 11.4 | 0.057 |
| Serum β-carotene (μg/ L) | 178.7 | 214.3 | 0.55 |
| Dietary intake per day | |||
| Total energy (kcal) | 2776.9 | 2634.0 | 0.33 |
| Fruit (g) | 114.0 | 135.0 | 0.25 |
| Vegetables (g) | 121.2 | 106.2 | 0.21 |
| Red meat (g) | 78.0 | 67.8 | 0.059 |
| Coffee (g) | 558.6 | 631.6 | 0.21 |
| Alcohol (ethanol, g) | 18.0 | 14.8 | 0.64 |
| Supplement use | |||
| Vitamin A (%) | 9.4 | 7.8 | 1.00 |
| Vitamin D (%) | 6.3 | 7.8 | 1.00 |
| Calcium (%) | 10.9 | 12.5 | 1.00 |
1Values are means unless otherwise indicated. All data were obtained at baseline.
2Wilcoxon rank test for continuous variables, or Fisher’s exact test for categorical variables.