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| Variable | With Zinc (n=50) | Without Zink(n=52) | p-value |
| Gender (Female %) | 50 | 51.9 | 0.85 |
| Age (mean±SD, year) | 49.1 ± 8.0 | 48.4 ± 8.3 | 0.67 |
| Smoking (%) | 4.0 | 9.6 | 0.26 |
| BMI | 25.8 ± 2.0 | 25.2 ± 2.3 | 0.14 |
| Ab level (mIU/mL) | 116.93 | 157.37 | 0.22 |
| Immunity (%) | 26.0 | 36.5 | 0.25 |
