Publication: Dataset used for the study entitled: A Longitudinal Robust Linear Mixed-Effects Analysis.
Date
2026-06-15
Authors
Villarejo GarcĂa, Diego
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Facultades de la UMU::Facultad de Ciencias del Deporte
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info:eu-repo/semantics/dataset
Description
Abstract
METHODOLOGICAL INFORMATION AND SAMPLE SIZE
This study followed a longitudinal, prospective, and multi-cohort quasi-experimental design. The initial clinical recruitment comprised 72 breast cancer survivors referred by the Murcian Health Service (Servicio Murciano de Salud, SMS) across health zones 1, 6, and 7. The source population presented high clinical heterogeneity, incorporating patients undergoing both conservative surgical procedures (lumpectomy, quadrantectomy, oncoplasty; 37.5%, n = 16) and radical/non-conservative interventions (complete, modified, or bilateral mastectomy; 52.8%, $n = 23$; along with additional bilateral procedures, 9.7%, $n = 4$), combined with or without axillary lymph node dissection and sentinel lymph node biopsy.
The final statistical monitoring focused on a strict per-protocol sample of 36 participants ($n = 36$) who complied with the clinical compliance threshold (Cumulative Attendance Percentage > 33.33%) and possessed complete data rows across all operational time points. Neuromuscular performance was tracked at baseline pre-intervention (PRE) and following a 12-week supervised resistance training macrocycle (POST). Because each participant was measured repeatedly across both upper limbs (Operated vs. Non-Operated), the final longitudinal data matrix contains a total volume of exactly $N = 128$ independent longitudinal observations ($obs$) clustered hierarchically within patients.
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