Development and initial psychometric validation of a scale measuring pregnant women's knowledge about PMTCT

Variables Overview Sociodemographic variables S01Q01 → Place of residence (categorical, nominal, coded by location names e.g., Bibémi). S01Q02 → Age (numeric, scale). Age_r → Recoded Age of participant (ordinal, grouped categories such as <25 years, 25–34, etc.). Occupation → Occupation (nominal: unemployed, employed, etc.). Life_Status → Statut of Life (nominal: in a relationship, single, etc.). Education → Level of education (nominal: no formal education, primary, secondary, etc.). Obstetric history S02Q01 → Number of pregnancies. S02Q02 → Number of deliveries. S02Q03 → Number of miscarriages. S02Q04 → Number of living children. S02Q05 → Number of deceased children. S02Q06 → Number of antenatal care (ANC) visits during pregnancy. Exposure to PMTCT S03Q02 → Have you heard about Prevention of Mother-To-Child Transmission (PMTCT) (binary: 0 = No, 1 = Yes). Knowledge scale (PMTCT) PMTCT_Knoledge Scale (text/label placeholder). Item_1 → An HIV-positive pregnant woman can give birth to a healthy child (binary: correct/incorrect). Item_2 → Preventing HIV transmission from mother to child requires medical intervention (binary). Item_3 → Antiretroviral treatment, taken by the mother and the child, prevents transmission (binary). Item_4 → Interventions to prevent mother-to-child HIV transmission exist (binary). Composite scores PMTCT_Kno… → Score de connaissance sur la PTME → Knowledge Score on PMTCT (numeric, scale, sum of items). PMTCT_Know → Distribution des Connaissances sur la PTME → Distribution of Knowledge on PMTCT (categorical: e.g., poor, fair, good knowledge). Measurement levels Nominal: categorical without order (place of residence, occupation, life status, education, PMTCT items). Ordinal: recoded age. Scale (continuous/interval/ratio): raw age, number of pregnancies, deliveries, miscarriages, children, ANC visits, knowledge score. In summary:This dataset combines sociodemographic characteristics, reproductive history, exposure to PMTCT information, and a knowledge assessment scale (4 items + composite score) for women participants. It is structured for both descriptive analysis (frequencies, distributions) and psychometric/validity testing (ROC analysis, sensitivity/specificity, etc.).