Association between age group and vitamin B12 level.
The current study reported a lack of association between the B12 deficiency and age groups (< 40, ≥ 40 years) according to the chi-square test (X2 = 2.428, (P -value = 0.119)) as illustrated in table 4. An independent sample t-test was also used to test the mean differences of B12 concerning age groups and the results showed no statistically meaningful differences between them (P =0.661) as shown in table 5.