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Status Vitamin D dan Hubungannya dengan Kadar Kolesterol Total Mahasiswa Fakultas Kedokteran Universitas Baiturrahmah Jelmila, Sri Nani; Mutiya Rahmi, Rafiqa; Suharni; Helmizar, Roland; Liana, Nana
Scientific Journal Vol. 5 No. 1 (2026): SCIENA Volume V No 1, January 2026
Publisher : CV. AKBAR PUTRA MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56260/sciena.v5i1.321

Abstract

Pendahuluan: Defisiensi vitamin D dilaporkan tinggi pada populasi dewasa muda termasuk mahasiswa kedokteran, meskipun berada di negara tropis. Vitamin D diduga berperan dalam metabolisme lipid melalui modulasi inflamasi dan regulasi metabolik.Tujuan penelitian: menganalisis status vitamin D dan hubungannya dengan kadar kolesterol total pada mahasiswa Fakultas Kedokteran Universitas Baiturrahmah. Metode: Penelitian analitik observasional dengan desain cross-sectional dilakukan pada 61 sampel. Kadar 25-hidroksivitamin D diperiksa dengan ELISA dan diklasifikasikan menjadi defisiensi, insufisiensi, dan sufisiensi, sedangkan kolesterol total diperiksa dengan metode enzimatik kolorimetrik. Hasil: Hasil menunjukkan status vitamin D terbanyak adalah defisiensi (36,1%), rerata kadar kolesterol total adalah 174,16±28,81 mg/dL. Analisis menunjukkan tidak terdapat hubungan bermakna antara status vitamin D dan kadar kolesterol total (p=0,14). Kesimpulan: defisiensi vitamin D merupakan kondisi yang dominan pada mahasiswa kedokteran, namun tidak berhubungan signifikan dengan kadar kolesterol total.
Enhancing Junior High School Students' Self-Efficacy through Self-Reflection-Based Classical Guidance Ayu Nursalama; Suharni; Nindia Harnes Prima Aidha
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 3 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i3.11488

Abstract

Low self-efficacy among junior high school students can undermine self-confidence and active engagement in learning; however, research positioning self-reflection as the core intervention in Guidance and Counseling services remains limited. This study aims to examine the effectiveness of self-reflection-based classical guidance services in improving the self-efficacy of ninth-grade students at a public junior high school in Madiun. A quantitative approach with a one-group pretest–posttest design was employed, involving 30 students selected through total sampling. Data were collected using a self-report scale and analyzed using a paired-samples t test and Cohen’s d_z. The findings reveal a statistically significant increase in the mean self-efficacy score from 142.70 at pretest to 171.60 at posttest, t(29) = −12.15, p < .001, with a very large effect size (d_z = 2.22). However, the decrease in the minimum score from 78.00 to 74.00 suggests that some students may have undergone a metacognitive calibration process toward a more realistic self-assessment. The study concludes that self-reflection-based classical guidance services are effective in enhancing students’ self-efficacy. These findings contribute to the development of student-centered Guidance and Counseling practices by emphasizing structured reflection as a central component of classical guidance and highlight the need for follow-up individual counseling for students requiring more targeted support.