Statistical analysis
Regarding descriptive statistics, continuous variables were reported as the mean and standard deviation, while categorical variables were reported as frequency and percentage.
A univariate regression analysis was performed to identify the psychosocial and demographic factors impacting birth weight. A Pearson’s coefficient correlation was performed for quantitative variables and birth weight. A multivariable analysis clustered all significant variables from the previous univariate test and measured their combined effect on birth weight.
Statistical significance was set at an α error <0.05. All reported probability values were two-tailed. The SPSS software, IBM SPSS Statistics for Windows, version 23 (IBM Corp.) was used for statistical purposes.