Gambaran Karakteristik Morfometri Pelvis pada Laki-Laki dan Perempuan di Kota Medan

Abstract

Background: Variations in pelvic morphometry have significant implications for reproductive health, body biomechanics, and obstetrics. Sexual dimorphism, age, and ethnicity are key factors influencing the distribution of pelvic shapes and dimensions. However, descriptive data on the local population in Medan remains limited. Objective: This study aims to analyze the distribution of pelvic morphometry shapes and dimensions in males and females based on age and ethnicity in Medan. Methods: A descriptive cross-sectional study was conducted using secondary medical record data from 143 patients at RSUP Haji Adam Malik, selected through quota sampling, and analyzed using SPSS. Results: The study revealed the dominance of android pelvic shapes in males (97.96%) and platypelloid (54.26%) as well as gynecoid (35.11%) pelvic shapes in females. Transverse pelvic dimensions were significantly larger than anteroposterior dimensions (12.31 cm : 10.88 cm), reflecting morphological adaptations for reproductive and biomechanical functions. Age-based variations showed a dominance of android shapes in younger groups and a transition to gynecoid and platypelloid shapes in middle-aged and older groups. Ethnic variations indicated that android shapes were more common among Batak (45.90%) and Javanese (46.81%) populations, while platypelloid shapes dominated among Malays (60%). Conclusion: This study demonstrates the dominance of android pelvic shapes in males, while platypelloid and gynecoid shapes are more common in females. Age-related variations indicate a transition from android shapes in younger groups to gynecoid in adults and platypelloid in older groups. Ethnic distribution shows the dominance of android shapes among Batak and Javanese, while platypelloid shapes are more frequent among Malays. The larger transverse pelvic dimensions compared to anteroposterior dimensions reflect adaptations for biomechanical and reproductive needs.