Deficiency of B vitamins in women of childbearing age, pregnant, and lactating women in Brazil: a systematic review

Table 2 Critical assessment of methodological quality of studies included in the systematic review

Q1 — Was the sample frame appropriate to address the target population (women of childbearing age, pregnant women, or lactating women from a specific location/city/state/region of Brazil)? Q2 — Were study participants sampled in an appropriate way? Q3 — Was the sample size adequate? Q4 — Were the study subjects and the setting described in detail? Q5 –— Was the data analysis conducted with sufficient coverage of the identified sample? Q6 — Were valid methods used to identify the deficiency of the B complex vitamin studied? Q7 — Was the vitamin B complex deficiency studied and measured in a standard and reliable way for all participants? Q8 — Was there appropriate statistical analysis? Q9 — Was the response rate adequate, and, if not, was the low response rate managed appropriately?
✓ yes, ✘ no, N/A not applicable, U unclear
^aAll were rated as “NOT APPLICABLE,” as statistical data were not extracted; only the number of cases and individuals was evaluated. The prevalence was subsequently calculated

ISSN: 2046-4053