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All Journal International Journal of Research in Community Services International Journal of Quantitative Research and Modeling
Natasya Tamarysma Putri
Management Study Program, Faculty of Economics and Business, Universitas Informatika Dan Bisnis Indonesia, Bandung, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Physics Social Sciences Other

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Negative Binomial Regression with Climatic and Sociodemographic Covariates for Modeling Overdispersed Dengue Hemorrhagic Fever Counts: Evidence from Bandung City, Indonesia Rifki Saefullah; Natasya Tamarysma Putri; Mugi Lestari
International Journal of Quantitative Research and Modeling Vol. 7 No. 2 (2026): International Journal of Quantitative Research and Modeling (IJQRM)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v7i2.1339

Abstract

Dengue Hemorrhagic Fever (DHF) remains one of the most prevalent vector-borne diseases in Indonesia, with Bandung City consistently reporting high annual incidence. Count regression models have been widely applied in disease epidemiology; however, many studies default to Poisson regression without testing for overdispersion, which violates a fundamental modeling assumption when variance exceeds the mean. This study proposes a Negative Binomial Regression (NBR) framework that jointly incorporates climatic variables (monthly rainfall, mean temperature, relative humidity) and sociodemographic covariates (population density, drainage quality index, vegetation cover) to model weekly DHF case counts across 30 sub-districts of Bandung City from 2019 to 2023. Overdispersion was formally assessed using the Cameron-Trivedi test. Incidence Rate Ratios (IRRs) and 95% confidence intervals were estimated for all predictors. Model selection was performed via AIC, BIC, and likelihood ratio tests against a Poisson baseline. Results demonstrate significant overdispersion (dispersion parameter ), confirming the appropriateness of NBR over Poisson regression. Monthly rainfall (IRR = 1.008, p < 0.001), lagged one-week cases ), and population density emerged as significant positive predictors, while drainage quality index was protective. The NBR model achieved substantially lower AIC (2810 vs 3240) and BIC (2820 vs 3245) compared to Poisson. These findings provide quantitative evidence for spatiotemporal DHF surveillance and can guide targeted vector-control resource allocation in urban West Java
Phygital Snake-and-Ladder Game-Based Health Education to Improve Clean and Healthy Living Behavior among Elementary School Students in Rural West Java, Indonesia Audrey Ariij Sya&#039;imaa HS; Natasya Tamarysma Putri; Grida Saktian Laksito
International Journal of Research in Community Services Vol. 7 No. 3 (2026): International Journal of Research in Community Service (IJRCS)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v7i3.1372

Abstract

Clean and Healthy Living Behavior (Perilaku Hidup Bersih dan Sehat/PHBS) remains a persistent public health challenge in Indonesian rural communities, where preventable infections such as diarrhea and acute respiratory infection continue to affect school-age children due to low hygiene knowledge and inconsistent practice. Conventional PHBS training relying solely on lectures or a single physical medium tends to produce only short-term knowledge gains without sustained behavioral change. This community service activity introduces a novel “phygital” (physical-digital) health education model that integrates a traditional snake-and-ladder board game with QR-code-linked micro-videos, a peer-led “Little PHBS Ambassador” program, and a two-week WhatsApp-based parental reinforcement scheme. The program targeted fourth- and fifth-grade students at an elementary school in Ciamis Regency, West Java Province. A one-group pretest-posttest design was employed, measuring knowledge, attitude, and practice (KAP) before the intervention, immediately after, and at a two-week follow-up. Data were analyzed using the Wilcoxon signed-rank test at a 0.05 significance level. The results indicated a statistically significant improvement in students’ knowledge, attitude, and hygiene-related practice scores from pretest to posttest, and the gains were largely retained at the two-week follow-up, suggesting that the combination of game-based learning, peer reinforcement, and digital follow-up supports longer-term behavior maintenance compared with single-modality approaches reported in prior studies. This model offers a low-cost, scalable, and culturally familiar strategy that schools, Community Health Centers (Puskesmas), and local governments can adopt to strengthen school-based health promotion and contribute to national efforts in reducing childhood morbidity linked to poor hygiene.
Co-Authors Audrey Ariij Sya&#039;imaa HS Grida Saktian Laksito Mugi Lestari Rifki Saefullah