Dataset supporting: Expert–Novice Inter-Rater Reliability and Longitudinal Stability of TW3-Based Skeletal Age Assessment Using DXA Hand Scans in Adolescent Athletes

This dataset contains skeletal age estimations assessed using the TW3-RUS method from DXA-derived hand scans in adolescent athletes. Data were collected at two time points (T1 and T2), separated by 1 year. The dataset includes chronological age and skeletal age assessments performed independently by an expert and a novice rater. The dataset supports analyses of inter-rater reliability and longitudinal stability.