Judul: Association of Breastfeeding Duration with General and Central Obesity among Women of Childbearing Age in Padang City, West Sumatera Province, Indonesia
Abstrak: Obesitas merupakan salah satu masalah utama kesehatan masyarakat dan menjadi faktor risiko dari berbagai penyakit tidak menular. Data dari Riset Kesehatan Dasar (Riskesdas) Indonesia tahun 2018 menunjukkan bahwa sebanyak 21,8% dan 31% masyarakat Indonesia berusia >15 tahun mengalami obesitas general dan sentral (berurutan). Angka persentase obesitas general dan sentral tersebut lebih tinggi di Kota Padang (24,1% dan 34,2% berurutan). Perempuan lebih berisiko mengalami obesitas karena persentase lemak tubuh yang lebih tinggi dan beberapa kondisi fisiologis yang dialami. Beberapa studi menemukan bahwa durasi menyusui berkolerasi dengan penurunan risiko obesitas, namun data dari Indonesia masih sangat terbatas. Tujuan dari penelitian ini adalah untuk menganalisis hubungan antara durasi menyusui dengan obesitas pada wanita usia subur (WUS). Penelitian ini menggunakan desain cross-sectional yang dilakukan pada Desember 2020-Januari 2021 di Kota Padang. Subjek merupakan WUS yang tidak sedang hamil dan menyusui, telah menyapih anaknya, dipilih secara purposive dengan jumlah akhir subjek sebanyak 103 orang. Protokol penelitian ini telah disetujui oleh Komisi Etik Penelitian yang Melibatkan Subjek Manusia LPPM IPB No. 321/IT3.KEPMSM-IPB/SK/2020. Data yang dikumpulkan meliputi karakteristik subjek dan keluarga, praktik menyusui, konsumsi pangan, dan aktivitas fisik melalui kuesioner serta data status gizi dan persentase lemak tubuh melalui pengukuran langsung menggunakan stature meter, pita pengukur, dan bioelectrical impedance analyzer. Pengolahan data menggunakan Microsoft Excel, SPSS 21.0 dan software nutrisurvey 2007. Uji normalitas menggunakan Kolmogorov-Smirnov. Uji beda menggunakan Chi-square dan Independent T-Test. Uji korelasi menggunakan analisis Spearman dan Pearson (sesuai normalitas distribusi data). Uji regresi menggunakan binary logistic regression. Indikator obesitas general dan sentral pada WUS yang menyusui lebih lama (≥12 bulan) signifikan lebih kecil (p<0,05) dibandingkan yang menyusui lebih singkat (<12 bulan) berdasarkan indeks massa tubuh (IMT) (24,26±3,32 vs. 27,89±6,06 kg/m2), persentase lemak tubuh (%LT) (31,55±3,74 vs. 35,35±4,46%), lingkar perut (LP) (79,69±7,98 vs. 88,51±12,79 cm), dan lemak viseral (LV) (6.10±2.85 vs. 9.78±6.43). Risiko untuk mengalami obesitas general dan sentral lebih tinggi pada WUS yang menyusui lebih singkat menurut indikator IMT [OR 3,454; 95%CI: 1,141-10,456], %LT [OR 7,041; 95%CI: 2,221-22,318], LP [OR 5,737; 95%CI: 1,779-18,501], dan LV [OR 7,622; 95%CI: 1,748-33,241]. Edukasi pentingnya mencukupkan durasi menyusui hingga dua tahun serta dukungan keluarga dan lingkungan sangat dibutuhkan WUS untuk mendukung pemberian ASI dan menurunkan kejadian penyapihan dini., Obesity is one of many major public health problems that becomes a risk factor for several non-communicable diseases. According to Indonesian Basic Health Research data in 2018, as many as 21,8% and 31% of Indonesians aged over 15 years old experienced general and central obesity (respectively). Padang City had a higher prevalence of general dan central obesity (24,1% and 34,2% respectively). Women pose a higher risk of obesity due to their high body fat levels and several physiological conditions underwent the bodies. Previous studies have found that breastfeeding correlates with a reduced risk of obesity. However, data from Indonesia on this matter are still limited. Therefore, this study aimed to analyze the relationship between breastfeeding and obesity. This study applied a cross-sectional design method which took place in Padang City, West Sumatra, Indonesia during December 2020 to January 2021. A total of 103 women of childbearing age who were not pregnant and had
Keyword: breastfeeding duration, central obesity, general obesity, visceral fat, women of childbearing age

Judul: Faktor Risiko Obesitas Sentral Pada Orang Dewasa Di Sulawesi Utara, Gorontalo Dan Dki Jakarta
Abstrak: Obesity is now considered as a major public health problem, affecting both developed and developing countries. Recently, central obesity has greater health hazards than overall obesity. The aim of this research is to analyze risk factors of central obesity among adults in North Sulawesi, Gorontalo, and Jakarta. This research used secondary data of Riskesdas 2007, Department of Health. The criterias of the study location was the province that had the three highest prevalence of central obesity. The total samples was 26 561 subjects aged 15 years. A logistic regressions was used to analyze risk factors of central obesity. Results showed that risk factors of central obesity in North Sulawesi are aged 35, women, married, divorce/widowed, high school, housewife, military/police/civil servants, private business officers, entrepreneur/private servant, urban area, and hard inactivity. Risk factors of central obesity in Gorontalo are aged 35, women, married, divorce/widowed, housewife, military/police/civil servants, entrepreneur/ private servant, expenditure 20 tile, urban area, hard inactivity, and mental disorder. Risk factors of central obesity in Jakarta are aged 35, women, married, divorce/widowed, housewife, private business officers, entrepreneur/private servant , expenditure fifth quintile , former smoker, fatty food, and mental disorder. Sweet food is the factor that reduce of central obesity in Jakarta. Women is more likely having central obesity in thirth provinces.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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