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- Comparison of mean serum vitamin B12 levels in patients with oral lichen planus according to gender.
| Sample size | Mean Serum Vitamin B12 | Standard Deviation | 95% Confidence interval | p value | |
|---|---|---|---|---|---|
| Males | 60 | 391.32 | 229.83 | 289.41–493.21 | 0.47 |
| Females | 60 | 388.34 | 177.48 | 330.00–446.68 |
