This study employed a secondary data analysis approach using data from the 2020 Somalia Health and Demographic Survey (SHDS). The SHDS is a nationally representative survey conducted by the Ministry of Health of Somalia and the Demographic Health Survey (DHS) Program, providing comprehensive data on various health indicators, including reproductive health, for women of reproductive age in Somalia.
Study Setting
Somalia is located in the Horn of Africa, with an estimated surface area of 637,657 km2. The country's terrain consists mainly of plateaus, plains, and highlands, and it boasts the longest coastline in Africa, stretching over 3,333 km along the Gulf of Aden to the north and the Indian Ocean to the east and south. Somalia borders Djibouti to the north-west, Ethiopia to the west, and Kenya to the south-west.
Participants
The target population for this study consisted of all young women aged 15–49 years residing in Somalia. The study sample was drawn from the SHDS dataset, which utilized a two-stage stratified cluster sampling technique. The first stage involved stratifying the population by region, including both urban and rural areas. Subsequently, each stratum was further divided into clusters, or Enumeration Areas (EAs), which typically comprise 200–300 households. In the second stage of sampling, 645 EAs were randomly selected from each stratum (202 from urban areas and 443 from rural areas). Finally, a fixed number of 28 households were randomly selected from each chosen EA, resulting in a total sample size of approximately 16,360 households were selected for the survey sample.
Data Analysis
The study used a weighted sample of 4,979 young women from the SHDS dataset, accounting for the non-proportional allocation of the sample across different regions and potential variations in response rates. The data analysis was conducted using Stata version 16.
Outcome Variable
The outcome variable was women's knowledge of the ovulatory cycle (KOC), assessed through a single question: "When is the ovulation time?" The response options included: During her period, after period ended, middle of the cycle, before the period begins, at any time, don’t know
The response option "middle of the cycle" was considered correct KOC and recoded as 1, while all other options were recoded as 0, creating a binary outcome variable.
Independent Variables
The study considered several independent variables:
Individual-level factors
Age (categorized into age groups), household wealth index (categorized into wealth quantiles), Women's media exposure (exposure to radio, television, newspapers/magazines, and social media), Educational status of the women (categorized into no education, primary, secondary, and higher education), Region (categorized into different regions of Somalia), Religion (categorized into different religions practiced in Somalia), Marital status (categorized into married, widowed, divorced, and never married)
Community-level factors
Residence (categorized into urban, rural, and nomadic), Community-level media exposure (aggregated from individual-level media exposure, categorized as low and high based on the national median value), Community education level (aggregated from individual-level education, categorized as low and high based on the national median value), Community poverty level (aggregated from household wealth index, categorized as low and high based on the national median value)
Statistical Analysis
The study employed a multilevel binary logistic regression analysis to identify individual and community-level determinants of KOC. The analysis incorporated sampling weights to account for the complex survey design.
To assess the clustering effect in the data, the study calculated the intra-class correlation coefficient (ICC) and median odds ratio (MOR). Four models were fitted: a null model (containing only the outcome variable), Model I (individual-level factors only), Model II (community-level factors only), and Model III (both individual and community-level factors). Model III was chosen as the best-fitted model based on its lowest deviance value.
Variables with a p-value < 0.2 in the bivariate multilevel regression were included in the multivariable multilevel logistic regression analysis. Factors with a p-value < 0.05 were considered statistically significant predictors of correct KOC. The adjusted odds ratio (AOR) and its 95% confidence interval (CI) were reported to show the strength and direction of the association between correct KOC and the independent factors.
Ethical Considerations
This study utilized publicly available data from the SHDS dataset. Online permission to access the data was obtained from the DHS program, and all ethical considerations related to confidentiality and informed consent were met during the original data collection phase of the SHDS.