De-identified analysis dataset for a peripheral blood karyotyping clinical cytogenetic service cohort

This dataset contains a conservative de-identified case-level analysis dataset supporting the manuscript titled "Male Sex, Not Advanced Age, Predicts Constitutional Chromosomal Abnormalities in Peripheral Blood Karyotyping". The public dataset includes generated case IDs and analysis variables for year, sex, age group, advanced maternal age status, standardised clinical indication, karyotype category, pathological abnormality status, and high-level mosaic subtype. To protect patient privacy, the dataset excludes original clinical records, direct patient identifiers, source laboratory identifiers, source filenames, raw clinical indication text, exact dates, physician or department fields, and full karyotype report strings. The dataset is intended to support reproducibility of the aggregate analyses reported in the manuscript while minimising the risk of participant re-identification.