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All Journal Scientia Psychiatrica Sriwijaya Journal of Obstetrics and Gynecology Sriwijaya Journal of Neurology Sriwijaya Journal of Otorhinolaryngology
Maximillian Wilson
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Biochemistry, Genetics & Molecular Biology Dentistry Health Professions Medicine & Pharmacology Neuroscience Nursing Public Health

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 1 
Evaluating Voice Quality and Pharyngeal Function in Professional Singers: A Cross-Sectional Study in Indonesia Indri Yani Septiana; Nur Diana; Eva Naritawati; Maximillian Wilson; Made Swastika
Sriwijaya Journal of Otorhinolaryngology Vol. 2 No. 1 (2024): Sriwijaya Journal of Otorhinolaryngology
Publisher : Phlox Institute: Indonesian Medical Research Organization

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59345/sjorl.v1i2.93

Abstract

Introduction: Professional singers heavily rely on their vocal capabilities, necessitating a thorough understanding of the interplay between voice quality and pharyngeal function to maintain vocal health and prevent disorders. This study aimed to evaluate these aspects in professional singers in Indonesia. Methods: This cross-sectional study involved 30 professional singers (15 males, 15 females) aged 20-40 years from Jakarta, Indonesia. Voice quality was assessed using the GRBAS scale (Grade, Roughness, Breathiness, Asthenia, Strain) and acoustic analysis (fundamental frequency, jitter, shimmer, harmonics-to-noise ratio). Pharyngeal function was evaluated via videofluoroscopy, measuring pharyngeal constriction ratio (PCR) during swallowing and vowel phonation. Results: Most singers exhibited normal voice quality per the GRBAS scale. Acoustic analysis revealed significantly higher fundamental frequency in females (p<0.05). Jitter, shimmer, and harmonics-to-noise ratio were within the normal range for both genders. PCR values were significantly higher during vowel phonation than swallowing in both genders (p<0.05), indicating increased pharyngeal constriction during singing. Conclusion: Professional singers in this study demonstrated good voice quality and adapted pharyngeal function to meet singing demands. Higher PCR during phonation suggests specific pharyngeal muscle activation patterns for vocal production. Further research is needed to explore the long-term effects of singing on pharyngeal function and identify potential risk factors for voice disorders in Indonesian singers.
Knowledge, Attitudes, and Practices Regarding Contraception Among Young Women in Urban Indonesia: A Mixed-Methods Approach Hidayat, Rachmat; Cinthya Callathea; Taufiq Indera Jayadi; Maximillian Wilson
Sriwijaya Journal of Obstetrics and Gynecology Vol. 2 No. 1 (2024): Sriwijaya Journal of Obstetrics and Gynecology
Publisher : Phlox Institute: Indonesian Medical Research Organization

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59345/sjog.v1i2.95

Abstract

Introduction: Unintended pregnancies and unsafe abortions remain significant public health concerns in Indonesia, particularly among young women in urban areas. This study aimed to explore the knowledge, attitudes, and practices (KAP) regarding contraception among young women residing in urban Indonesia, employing a mixed-methods approach to gain an in-depth understanding of this complex issue. Methods: This study used a sequential explanatory mixed-methods design. The quantitative phase involved a cross-sectional survey of 500 young women aged 18-24 years residing in Jakarta, Indonesia. A structured questionnaire assessed their knowledge about various contraceptive methods, attitudes towards contraception, and current contraceptive practices. The qualitative phase comprised in-depth interviews with 30 participants purposively selected from the survey sample to explore their experiences, beliefs, and perspectives on contraceptive use. Quantitative data were analyzed using descriptive statistics and logistic regression, while thematic analysis was employed for qualitative data. Results: The quantitative findings revealed that while the majority of participants had good knowledge about contraception, misconceptions and gaps existed regarding specific methods, particularly long-acting reversible contraceptives (LARCs). Attitudes towards contraception were generally positive, although concerns about side effects and social stigma were prevalent. The prevalence of current contraceptive use was moderate, with condoms and oral contraceptive pills being the most common methods. Qualitative findings provided deeper insights into the factors influencing contraceptive use, including perceived susceptibility to pregnancy, partner communication, family and social influences, access to healthcare services, and religious beliefs. Conclusion: This study highlights the need for comprehensive sexuality education programs tailored to address misconceptions and promote informed decision-making about contraception among young women in urban Indonesia. Strategies to improve access to youth-friendly contraceptive services and address social and cultural barriers to contraceptive use are also essential.
Prenatal Exposure to Maternal Stress and Neurodevelopmental Outcomes in Children: A Longitudinal Study with Epigenetic Analysis in Jakarta, Indonesia Fatimah Mursyid; Akmal Hasan; Tomiola Owkwulu; Maximillian Wilson; Yi-Fen Huang; Husin Sastranagara
Sriwijaya Journal of Neurology Vol. 2 No. 1 (2024): Sriwijaya Journal of Neurology
Publisher : Phlox Institute: Indonesian Medical Research Organization

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59345/sjn.v1i2.81

Abstract

Introduction: Prenatal exposure to maternal stress has been identified as a potential risk factor for adverse neurodevelopmental outcomes in children. This study aimed to investigate the association between prenatal maternal stress and neurodevelopmental outcomes in children in Jakarta, Indonesia, and to explore the potential mediating role of epigenetic modifications. Methods: A longitudinal cohort study was conducted involving 300 pregnant women recruited from antenatal clinics in Jakarta. Maternal stress was assessed during the second trimester of pregnancy using the Perceived Stress Scale (PSS). Neurodevelopmental outcomes in children were evaluated at 12 and 24 months of age using the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III). Epigenetic analysis of cord blood DNA methylation was performed using the Illumina Infinium MethylationEPIC BeadChip. Results: Higher maternal stress scores during pregnancy were significantly associated with lower cognitive, language, and motor scores in children at 12 and 24 months of age. Epigenetic analysis revealed differential methylation patterns in genes related to neurodevelopment in children exposed to high prenatal maternal stress. Mediation analysis indicated that DNA methylation partially mediated the association between prenatal maternal stress and neurodevelopmental outcomes. Conclusion: Prenatal exposure to maternal stress is associated with adverse neurodevelopmental outcomes in children, and epigenetic modifications may play a mediating role in this relationship. These findings highlight the importance of addressing maternal stress during pregnancy to promote optimal child neurodevelopment.
Beyond the Canopy Cover: A Comparative Mediation Analysis of Green Space Quality versus Quantity on Mental Well-being and Social Cohesion in High-Density Low-Income Neighborhoods Jasmila Tanjung; Maya Enderson; Taufiq Indera Jayadi; Eva Naritawati; Nurul Hanifah; Maximillian Wilson
Scientia Psychiatrica Vol. 6 No. 2 (2025): Scientia Psychiatrica
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/scipsy.v6i3.197

Abstract

Introduction: Rapid urbanization in the Global South has precipitated a mental health crisis, particularly in high-density, low-income neighborhoods where environmental stressors are endemic. While the association between urban green space (UGS) and mental well-being is well-documented, a critical knowledge gap remains regarding the differential impacts of green space quantity (availability) versus quality (usability/biodiversity) and the mediating role of social cohesion. Methods: This cross-sectional study employed a comparative mediation analysis involving 1,240 residents across 15 high-density districts in Jakarta, Indonesia. UGS quantity was measured using satellite-derived Normalized Difference Vegetation Index (NDVI), while quality was assessed using the Quality of Public Open Space Tool (POST). Mental well-being was evaluated using the WHO-5 Index, and physiological stress was quantified via salivary cortisol. Structural Equation Modeling (SEM) was utilized to test the mediating pathways of social cohesion and physical activity. Results: UGS quality demonstrated a significantly stronger direct effect on mental well-being (β = 0.42, p < 0.001) compared to UGS quantity (β = 0.15, p < 0.05). Social cohesion fully mediated the relationship between UGS quality and well-being (Indirect Effect = 0.18, 95% CI [0.12, 0.25]), whereas salivary cortisol levels were inversely associated primarily with UGS quality (β = -0.33, p < 0.001). Conclusion: In resource-constrained urban environments, the quality of green space—defined by safety, amenities, and aesthetics—is a more critical determinant of public mental health than mere vegetative cover.
Quantifying the Boiling Point: A Distributed Lag Non-Linear Analysis of Heatwave Intensity and the 'Thermal Distress' Threshold for Psychiatric Morbidity in an Indonesian Metropolis Taufiq Indera Jayadi; Eva Naritawati; Nurul Hanifah; Maximillian Wilson; Khairiel Anwar; Febria Suryani; Zaki Ahmad
Scientia Psychiatrica Vol. 6 No. 3 (2025): Scientia Psychiatrica
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/scipsy.v6i3.198

Abstract

Introduction: The Indonesian archipelago sits at the forefront of the climate crisis, yet the intersection of heat stress and mental health in this equatorial region remains under-researched. Unlike temperate climates, where heatwaves are sporadic, Indonesian cities face a chronic thermal load exacerbated by the Urban Heat Island effect. Methods: We conducted a retrospective ecological time-series analysis in Jakarta, Indonesia, spanning the period from January 1st, 2014, to December 31st, 2024. Daily psychiatric Emergency Department admissions (Total N = 48,210) were aggregated from three referral hospitals. We utilized a Distributed Lag Non-linear Model combined with a quasi-Poisson regression to correlate admissions with meteorological data from the Indonesian Agency for Meteorology, Climatology, and Geophysics, adjusting for holidays, day of the week, and particulate matter 2.5. Results: The Thermal Distress Threshold was identified at a Wet Bulb Globe Temperature of 29.8°C, reflecting a high degree of physiological acclimatization. Beyond this tipping point, the cumulative Relative Risk for acute psychiatric episodes rose to 1.21 (95% Confidence Interval: 1.14–1.29) at lag 0–3 days. Schizophrenia spectrum disorders showed the highest vulnerability (Relative Risk = 1.26) during the transition season heat spikes. Conclusion: The study establishes a localized thermal threshold for psychiatric emergencies in Indonesia. The findings suggest that high ambient humidity, characteristic of the Indonesian climate, significantly amplifies the psychiatric risk of heat. These results necessitate the integration of psychiatric protocols into the BPJS Kesehatan national health strategy for climate adaptation.
Co-Authors Akmal Hasan Cinthya Callathea Eva Naritawati Fatimah Mursyid Febria Suryani Husin Sastranagara Indri Yani Septiana Jasmila Tanjung Khairiel Anwar Made Swastika Maya Enderson Nur Diana Nurul Hanifah RACHMAT HIDAYAT Taufiq Indera Jayadi Tomiola Owkwulu Yi-Fen Huang Zaki Ahmad