Data_Sheet_1_Anaemia among women of reproductive age in selected sub-Saharan African countries: multivariate decomposition analyses of the demographic and health surveys data 2008–2018.docx

ObjectivesThe burden and highest regional prevalence of anaemia is reported in sub-Saharan Africa (SSA). The study evaluated changes in anaemia prevalence across the Demographic Health Surveys (DHS) periods in SSA and reported factors influencing observed changes in the trend.MethodThe study was implemented by a two-stage cross-sectional stratified sampling approach. The study involved women of reproductive age (15–49 years) in sub-Saharan Africa countries (Ghana, Sierra Leone, Mali, and Benin) using two different periods of their demographic health surveys (DHS) data. The study adopted both descriptive and inferential statistical methods. The chi-square test was used to determine the existence of a statistically significant relationship between the outcome and predictor variables and test the observed changes in anaemia. Multivariable logistic regression analyses were conducted on each survey year and the pooled dataset for eligible study countries. Multivariate decomposition analysis was performed to explain how compositional changes and behavioural effects of women characteristics affected the changes in anaemia prevalence. The study reported frequencies, percentages and odds ratios along with their 95% confidence intervals (CI).ResultsGhana and Sierra Leone experienced 17.07% [95% CI: 14.76–19.37, p  0.05] of anaemia decrease from period 1 to period 2, respectively, while Mali and Benin experienced 11% [95% CI: 9.14–12.90, p

研究目标：贫血在撒哈拉以南非洲（SSA）地区负担沉重，且地区发病率最高。本项研究评估了SSA地区人口健康调查（DHS）不同时期贫血发病率的变化，并报告了影响观察到趋势变化的因素。研究方法：本研究采用两阶段横断面分层抽样方法实施。研究涉及撒哈拉以南非洲国家（加纳、塞拉利昂、马里和贝宁）的育龄妇女（15-49岁），利用其人口健康调查（DHS）数据的不同时期。研究采用了描述性和推断性统计分析方法。卡方检验用于确定结果变量与预测变量之间是否存在统计学上显著的关联，并检验贫血观察到的变化。对每个调查年份和合格研究国家的合并数据集进行了多变量逻辑回归分析。进行多元分解分析以解释女性特征构成变化和行为效应如何影响贫血发病率的变化。研究报告了频率、百分比和优势比及其95%置信区间（CI）。研究结果：加纳和塞拉利昂分别从第1期到第2期经历了17.07%[95% CI: 14.76-19.37, p > 0.05]的贫血减少，而马里和贝宁经历了11%[95% CI: 9.14-12.90, p > 0.05]的贫血减少。