Mean differences in vitamin B12 levels between males and females.
The mean differences of serum B12 level between males and females were determined by an independent sample t-test and the results are shown in Table 2. Our study showed a statistically significant difference in the mean of serum B12 between genders (P -value = 0.002), where the mean of serum B12 in females was 265.09 ±106.35 pg/mL while it was 307.59 ±90.75 pg/mL in males.
In addition, a Chi-Square independence test was used to examine the association between B12 deficiency and gender. The findings showed that there was a statistically significant association between gender and B12 deficiency (X2 = 7.399, (P -value = 0.007)) which indicates that the females had a higher proportion of B12 deficiency compared to the males as shown in table 3 and figure 1.