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Featured researches published by Masamine Jimba.


Tropical Medicine & International Health | 2003

Mumbai disease in far western Nepal: HIV infection and syphilis among male migrant-returnees and non-migrants.

Krishna C. Poudel; Junko Okumura; Jeevan B. Sherchand; Masamine Jimba; Izumi Murakami; Susumu Wakai

Objective To measure the seroprevalence of human immunodeficiency virus (HIV) infection and syphilis, and to assess the behavioural risk factors for these infections among migrant‐returnees and non‐migrants in far western Nepal.


Malaria Journal | 2010

School-based participatory health education for malaria control in Ghana: engaging children as health messengers

Irene Ayi; Daisuke Nonaka; Josiah K Adjovu; Shigeki Hanafusa; Masamine Jimba; Kwabena M. Bosompem; Tetsuya Mizoue; Tsutomu Takeuchi; Daniel A. Boakye; Jun Kobayashi

BackgroundSchool children have been increasingly recognized as health messengers for malaria control. However, little evidence is available. The objective of this study was to determine the impact of school-based malaria education intervention on school children and community adults.MethodsThis study was conducted in the Dangme-East district of the Greater Accra Region, Ghana, between 2007 and 2008. Trained schoolteachers designed participatory health education activities and led school children to disseminate messages related to malaria control to their communities. Three schools and their respective communities were chosen for the study and assigned to an intervention group (one school) and a control group (two schools). Questionnaire-based interviews and parasitological surveys were conducted before and after the intervention, with the intervention group (105 children, 250 community adults) and the control group (81 children, 133 community adults). Chi-square and Fishers Exact tests were used to analyse differences in knowledge, practices, and parasite prevalence between pre- and post-intervention.ResultsAfter the intervention, the misperception that malaria has multiple causes was significantly improved, both among children and community adults. Moreover, the community adults who treated a bed net with insecticide in the past six months, increased from 21.5% to 50.0% (p < 0.001). Parasite prevalence in school children decreased from 30.9% to 10.3% (p = 0.003). These positive changes were observed only in the intervention group.ConclusionsThis study suggests that the participatory health education intervention contributed to the decreased malaria prevalence among children. It had a positive impact not only on school children, but also on community adults, through the improvement of knowledge and practices. This strategy can be applied as a complementary approach to existing malaria control strategies in West African countries where school health management systems have been strengthened.


Tropical Medicine & International Health | 2004

Migrants' risky sexual behaviours in India and at home in far western Nepal.

Krishna C. Poudel; Masamine Jimba; Junko Okumura; Anand B. Joshi; Susumu Wakai

Objective  To examine Nepali migrants’ vulnerability to HIV/sexually transmitted infections (STIs) and their possible role in causing the epidemic in far western Nepal.


BMC Public Health | 2010

Role of risk and protective factors in risky sexual behavior among high school students in Cambodia.

Siyan Yi; Krishna C. Poudel; Junko Yasuoka; Paula H. Palmer; Songky Yi; Masamine Jimba

BackgroundIn many developing countries, adolescents have become increasingly prone to engage in habitual risky sexual behavior such as early sexual initiation and unprotected sex. The objective of this study was to identify the operation of risk and protective factors in individual, family, peer, school, and community domains in predicting risky sexual behavior among male and female adolescents in Cambodia.MethodsFrom October 2007 to January 2008, we collected data from 1,049 students aged 14 to 20 years. Risky sexual behavior was measured using a scale consisting of four items: sexual intercourse during the past three months, number of sex partners during the past three months, age at first experience of sexual intercourse, and use of condom in last sexual intercourse. The risk factors examined included substance use, depression, peer delinquency, family violence, and community violence. Studied protective factors included family support function, frequency of family dinner, and school attachment.ResultsOf the 1,049 students surveyed, 12.7% reported sexual intercourse during the past three months. Out of those sexually active students, 34.6% reported having two or more sex partners over the same period, and 52.6% did not use a condom during their last sexual intercourse. After controlling for other covariates, a higher likelihood of risky sexual behavior remained significantly associated among male participants with higher levels of substance use, higher levels of peer delinquency, and higher family income. In contrast, risky sexual behavior did not retain its associations with any of the measured protective factors among male participants. Among female participants, a higher likelihood of risky sexual behavior remained significantly associated with higher levels of substance use, higher levels of community-violence witnessing, and lower levels of family support.ConclusionsThe findings suggest the importance of considering gender-related differences in the effects of risk and protective factors when designing and implementing prevention programs. In interventions for both male and female adolescents, prevention of substance use and risky sexual behavior should be integrated. For boys, efforts should focus on the reduction of peer delinquency, while, for girls, improvement of family support should be emphasized.


International Breastfeeding Journal | 2012

Infant feeding practices and breastfeeding duration in Japan: A review

Madoka Inoue; Colin Binns; Keiko Otsuka; Masamine Jimba; Manami Matsubara

The Japanese health system places great emphasis on healthy development. However, the prevalence of Exclusive Breastfeeding at one month postpartum between 1980 and 2005 has remained unchanged, fluctuating between 42% and 49%. At the same time, the Any Breastfeeding prevalence has gradually increased from about 80% to 95%. In 2010, the latest national breastfeeding report showed that ‘exclusive’ and ‘any’ breastfeeding rates have improved. However, as the World Health Organization (WHO) definition of breastfeeding practices was not used in this study or in other national surveys, it is difficult to interpret these latest results. While the Japanese government has launched several promotion projects, there have been few studies and reviews of risk factors that influence breastfeeding duration. The objectives of this review were to summarise the factors that have influenced the duration of breastfeeding in Japan to provide information relevant to breastfeeding promotion programs. A search of electronic databases in Japanese and English was undertaken up to 2011. The inclusion criteria for this review were studies that focused on infant feeding practices and targeted Japanese mothers, fathers, or health professionals, but excluded mothers’ friends and peer groups. In total, 12 articles were selected for the final analysis. Smoking status, low birth weight of infants and maternal perceptions of insufficient breast milk supply were negative influences on breastfeeding duration, while support from husbands/partners is associated with continued breastfeeding. Some factors that have been found to be associated with breastfeeding in other countries, including maternal age, family income, maternal educational levels, and living with grandparents of infants have not been confirmed in Japan. While the national breastfeeding rates were higher than other countries of similar health status, inconsistent knowledge of breastfeeding benefits and inappropriate hospital practices remain in Japan may be associated with increased the use of infant formula and reduced breastfeeding duration. Most of the studies reviewed were cross-sectional in design, with only a limited number of cohort studies. Also many published studies used small sample sizes. Cohort studies of infant feeding practices with larger sample sizes are required to monitor trends in rates and risk factors for breastfeeding outcomes.


Nutrition Journal | 2013

Effectiveness of nutrition training of health workers toward improving caregivers’ feeding practices for children aged six months to two years: a systematic review

Bruno F. Sunguya; Krishna C. Poudel; Linda B. Mlunde; Prakash Shakya; David P Urassa; Masamine Jimba; Junko Yasuoka

BackgroundNutrition training of health workers can help to reduce child undernutrition. Specifically, trained health workers might contribute to this end through frequent nutrition counseling of caregivers. This may improve child-feeding practices and thus reduce the risk of undernutrition among children of counseled caregivers. Although studies have shown varied impacts of health workers’ nutrition training on child feeding practices, no systematic review of the effectiveness of such intervention has yet been reported. Therefore, we conducted this study to examine the effectiveness of nutrition training for health workers on child feeding practices including feeding frequency, energy intake, and dietary diversity among children aged six months to two years.MethodsWe searched the literature for published randomized controlled trials (RCTs) and cluster RCTs using medical databases including PubMed/MEDLINE, CINAHL, EMBASE, and ISI Web of Knowledge, and through WHO regional databases. Our intervention of interest was nutrition training of health workers. We pooled the results of the selected trials, evaluated them using the Grades of Recommendation, Assessment, Development, and Evaluation (GRADE) criteria, and calculated the overall effect size of the intervention in meta-analyses.ResultsTen RCTs and cluster RCTs out of 4757 retrieved articles were eligible for final analyses. Overall, health workers’ nutrition training improved daily energy intake of children between six months and two years of age. The pooled evidence from the three studies reporting mean energy intake per day revealed a standardized mean difference (SMD) of 0.76, 95% CI (0.63-0.88). For the two studies with median energy intake SMD was 1.06 (95% CI 0.87-1.24). Health workers’ nutrition training also improved feeding frequency among children aged six months to two years. The pooled evidence from the three studies reporting mean feeding frequency showed an SMD of 0.48 (95% CI 0.38-0.58). Regarding dietary diversity, children in intervention groups were more likely to consume more diverse diets compared to their counterparts.Conclusion and recommendationsNutrition training for health workers can improve feeding frequency, energy intake, and dietary diversity of children aged six months to two years. Scaling up of nutrition training for health workers presents a potential entry point to improve nutrition status among children.


PLOS ONE | 2014

Perceived Family Support, Depression, and Suicidal Ideation among People Living with HIV/AIDS: A Cross- Sectional Study in the Kathmandu Valley, Nepal

Rachel M. Amiya; Krishna C. Poudel; Kalpana Poudel-Tandukar; Basu Dev Pandey; Masamine Jimba

Background Depression and suicidal thinking occur frequently alongside HIV/AIDS, triggering profound detrimental impacts on quality of life, treatment adherence, disease progression, and mortality. Yet the psychosocial factors contributing to these psychiatric comorbidities remain underexplored, particularly in the developing country context. This study thus examined different dimensions of perceived family support in relation to depression and suicidal ideation among people living with HIV/AIDS (PLWHA) in Nepal. Methods A cross-sectional survey of 322 adult PLWHA residing in the Kathmandu Valley, Nepal was conducted. Data were analyzed using multiple logistic regressions for correlates of Beck Depression Inventory (BDI)-Ia-defined depressive symptoms and suicidal ideation in the past 2 weeks. Perceived family support, measured using the 10-item Nepali Family Support and Difficulty Scale, was entered into separate models, in turn, as a composite score, for each sub-scale (emotional, instrumental, and negative support), and for each individual item. Results Overall, 25.5% of participants registered BDI-Ia-defined depression, with significantly lower rates among those with perceived family support scores in the highest (AOR = 0.19; 95% CI = 0.07, 0.55) and middle (AOR = 0.38; 95% CI = 0.17, 0.86) tertiles relative to those with lowest-tertile scores. Meanwhile, 14.0% reported suicidal thinking, with significantly lower rates among those in the highest perceived family support tertile relative to the lowest (AOR = 0.25; 95% CI = 0.07, 0.91). Broken down by support sub-scale, only negative support (i.e. family difficulty) was significant in its correlations with both outcomes – a trend similarly reflected in the item-wise analyses. Conclusions Our findings highlight an important role for family support in determining experiences of depression and suicidality among PLWHA. Incorporating family counseling and support services – with special focus on ameliorating negative interaction and bolstering emotional support – into HIV care and treatment services may help to improve mental health along with overall wellness and treatment outcomes for HIV-positive populations in Nepal and similar settings.


Aids Care-psychological and Socio-medical Aspects of Aids\/hiv | 2011

Perceived social support and the psychological well-being of AIDS orphans in urban Kenya.

Sumiyo Okawa; Junko Yasuoka; Naoko Ishikawa; Krishna C. Poudel; Allan Ragi; Masamine Jimba

Parental deaths due to AIDS seriously affect the psychological well-being of children. Social support may provide an effective resource in the care of vulnerable children in resource-limited settings. However, few studies have examined the relationships between social support and psychological well-being among AIDS orphans. This cross-sectional study was conducted to explore associations between perceived social support (PSS) and the psychological well-being of AIDS orphans, and to identify socio-demographic factors that are associated with PSS. Data were collected from 398 pairs of AIDS orphans (aged 10–18 years) and their caregivers in Nairobi, Kenya. The participants provided information on their socio-demographic characteristics, the childrens PSS, and the childrens psychological status (based on measures of depressive symptoms and self-esteem). Of the 398 pairs, 327 were included in the analysis. PSS scores of AIDS orphans showed significant correlations with depressive symptoms (ρ =−0.31, p<0.001) and self-esteem (ρ=0.32, p<0.001). Socio-demographic factors, such as HIV-positive status of children (β=3.714, p=0.014) and cohabitation with siblings (β=3.044, p=0.016), were also associated with higher PSS scores. In particular, HIV-infected children (n=37) had higher scores of PSS from a special person (β=2.208, p=0.004), and children living with biological siblings (n=269) also had higher scores of PSS from both a special person (β=1.411, p=0.029) and friends (β=1.276, p=0.039). In conclusion, this study showed that PSS is positively associated with the psychological well-being of AIDS orphans. Siblings and special persons can be effective sources of social support for AIDS orphans, which help to promote their psychological well-being.


BMC Public Health | 2011

Undernutrition among HIV-positive children in Dar es Salaam, Tanzania: antiretroviral therapy alone is not enough

Bruno F. Sunguya; Krishna C. Poudel; Keiko Otsuka; Junko Yasuoka; Linda B. Mlunde; David P Urassa; Namala P Mkopi; Masamine Jimba

BackgroundThe prevalence of HIV/AIDS has exacerbated the impact of childhood undernutrition in many developing countries, including Tanzania. Even with the provision of antiretroviral therapy, undernutrition among HIV-positive children remains a serious problem. Most studies to examine risk factors for undernutrition have been limited to the general population and ART-naive HIV-positive children, making it difficult to generalize findings to ART-treated HIV-positive children. The objectives of this study were thus to compare the proportions of undernutrition among ART-treated HIV-positive and HIV-negative children and to examine factors associated with undernutrition among ART-treated HIV-positive children in Dar es Salaam, Tanzania.MethodsFrom September to October 2010, we conducted a cross-sectional survey among 213 ART-treated HIV-positive and 202 HIV-negative children in Dar es Salaam, Tanzania. We measured the childrens anthropometrics, socio-demographic factors, food security, dietary habits, diarrhea episodes, economic status, and HIV clinical stage. Data were analyzed using both univariate and multivariate methods.ResultsART-treated HIV-positive children had higher rates of undernutrition than their HIV-negative counterparts. Among the ART-treated HIV-positive children, 78 (36.6%) were stunted, 47 (22.1%) were underweight, and 29 (13.6%) were wasted. Households of ART-treated HIV-positive children exhibited lower economic status, lower levels of education, and higher percentages of unmarried caregivers with higher unemployment rates. Food insecurity was prevalent in over half of ART-treated HIV-positive childrens households. Furthermore, ART-treated HIV-positive children were more likely to be orphaned, to be fed less frequently, and to have lower body weight at birth compared to HIV-negative children.In the multivariate analysis, childs HIV-positive status was associated with being underweight (AOR = 4.61, 95% CI 1.38-15.36 P = 0.013) and wasting (AOR = 9.62, 95% CI 1.72-54.02, P = 0.010) but not with stunting (AOR = 0.68, 95% CI 0.26-1.77, P = 0.428). Important factors associated with underweight status among ART-treated HIV-positive children included hunger (AOR = 9.90, P = 0.022), feeding frequency (AOR = 0.02, p < 0.001), and low birth weight (AOR = 5.13, P = 0.039). Factors associated with wasting among ART-treated HIV-positive children were diarrhea (AOR = 22.49, P = 0.001) and feeding frequency (AOR = 0.03, p < 0.001).ConclusionHIV/AIDS is associated with an increased burden of child underweight status and wasting, even among ART-treated children, in Dar es Salaam, Tanzania. In addition to increasing coverage of ART among HIV-positive children, interventions to ameliorate poor nutrition status may be necessary in this and similar settings. Such interventions should aim at promoting adequate feeding patterns, as well as preventing and treating diarrhea.


The Lancet | 2008

Domestic violence against women in Nepal.

Kalpana Poudel-Tandukar; Krishna C. Poudel; Junko Yasuoka; Takashi Eto; Masamine Jimba

Contant CME, Hop WCJ, van ‘t Sant HP, et al. Mechanical bowel preparation for elective colorectal surgery: a multicentre randomised trial. Lancet 2007; 370: 2112–17—In this Article (Dec 22/29), the “Role of the funding source” section was omitted. It should have read “There was no funding source or sponsor. The corresponding author had full access to all the data in the study and had fi nal responsibility for the decision to submit for publication.” The “Contributors” section was also omitted, and should have stated that “All authors participated in the data analysis and reporting stage of this manuscript, and had seen and approved the fi nal version.” The “Confl ict of interest statement” should have read “We declare that we have no confl ict of interest.” Domestic violence against women in Nepal

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Krishna C. Poudel

University of Massachusetts Amherst

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Kalpana Poudel-Tandukar

University of Massachusetts Amherst

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