Elizabeth Lowenthal

Dr. Elizabeth Lowenthal

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Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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20 December 2018 in BMC Public Health
Verified
Journal Article
Open access
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KRKatherine Riva
Katherine Riva
LALynne Allen-Taylor
Lynne Allen-Taylor
WSWill D. Schupmann
Will D. Schupmann
SMSeipone Mphele
Seipone Mphele
NMNeo Moshashane
Neo Moshashane
ELElizabeth Lowenthal
Elizabeth Lowenthal
Alcohol and illicit drug use has been recognized as a growing problem among adolescents in Botswana. Little is known about factors affecting alcohol and drug use among Botswana’s secondary school students. To aid the design and implementation of effective public health interventions, we sought to determine the prevalence of alcohol and drug use in secondary school students in urban and peri-urban areas of Botswana, and to evaluate risk and protective factors for substance use. We performed a 72-item cross-sectional survey of students in 17 public secondary schools in Gaborone, Lobatse, Molepolole and Mochudi, Botswana. The World Health Organization’s (WHO) Alcohol Use Disorder Identification Test (AUDIT) was used to define hazardous drinking behavior. Using Jessor’s Problem Behavior Theory (PBT) as our conceptual framework, we culturally-adapted items from previously validated tools to measure risk and protective factors for alcohol and drug use. Between-group differences of risk and protective factors were compared using univariate binomial and multinomial-ordinal logit analysis. Relative risks of alcohol and drug use by demographic, high risks and low protections were calculated. Multivariate ordinal-multinomial cumulative logit analysis, multivariate nominal-multinomial logit analysis, and binominal logit analysis were used to build models illustrating the relationship between risk and protective factors and student alcohol and illicit drug use. Clustered data was adjusted for in all analyses using Generalized Estimating Equations (GEE) methods. Of the 1936 students surveyed, 816 (42.1%) reported alcohol use, and 434 (22.4%) met criteria for hazardous alcohol use. Illicit drug use was reported by 324 students (16.7%), with motokwane (marijuana) being the most commonly used drug. Risk factors more strongly associated with alcohol and drug use were reported alcohol availability, individual and social vulnerability factors, and poor peer modeling. Individual and social controls protections appear to mitigate risk of student alcohol and drug use. Alcohol and illicit drug use is prevalent among secondary school students in Botswana. Our data suggest that interventions that reduce the availability of alcohol and drugs and that build greater support networks for adolescents may be most helpful in decreasing alcohol and drug use among secondary school students in Botswana.

31 January 2012 in AIDS Care
Verified
Journal Article
Closed access
ELElizabeth Lowenthal
Elizabeth Lowenthal
KLKathy Lawler
Kathy Lawler
NHNurit Harari
Nurit Harari
LMLesedi Moamogwe
Lesedi Moamogwe
JMJaphter Masunge
Japhter Masunge
RGRobert Gross
Robert Gross
Psychosocial dysfunction in older children and adolescents is common and may lead to nonadherence to HIV treatments. Poor adherence leads to HIV treatment failure and the development of resistant virus. In resource-limited settings where treatment options are typically limited to only one or two available lines of therapy, identification of individuals at highest risk of failure before failure occurs is of critical importance. Rapid screening tools for psychosocial dysfunction may allow for identification of those children and adolescents who are most likely to benefit from limited psychosocial support services targeted at preventing HIV treatment failure. The Pediatric Symptom Checklist (PSC) is used in high resource settings for rapid identification of at-risk youth. In 692 HIV-infected treated children (ages of 8–< 17 years) in Botswana, having a high score on the PSC was associated with having virologic failure (OR 1.7, 95% CI: 1.1–2.6). The PSC may be a useful screening tool in pediatric HIV.

1 May 2013
Verified
Journal Article
Closed access
ELElizabeth Lowenthal
Elizabeth Lowenthal
JEJonas H. Ellenberg
Jonas H. Ellenberg
Edwin MachineEdwin Machine
Edwin Machine
ASAditi Sagdeo
Aditi Sagdeo
SBSefelani Boiditswe
Sefelani Boiditswe
RGRobert Gross
Robert Gross
Worldwide, the nonnucleoside reverse transcriptase inhibitors (NNRTIs) efavirenz and nevirapine are commonly used in first-line antiretroviral regimens in both adults and children with human immunodeficiency virus (HIV) infection. Data on the comparative effectiveness of these medications in children are limited. To investigate whether virological failure is more likely among children who initiated 1 or the other NNRTI-based HIV treatment. Retrospective cohort study of children (aged 3-16 years) who initiated efavirenz-based (n = 421) or nevirapine-based (n = 383) treatment between April 2002 and January 2011 at a large pediatric HIV care setting in Botswana. The primary outcome was time from initiation of therapy to virological failure. Virological failure was defined as lack of plasma HIV RNA suppression to less than 400 copies/mL by 6 months or confirmed HIV RNA of 400 copies/mL or greater after suppression. Cox proportional hazards regression analysis compared time to virological failure by regimen. Multivariable Cox regression controlled for age, sex, baseline immunologic category, baseline clinical category, baseline viral load, nutritional status, NRTIs used, receipt of single-dose nevirapine, and treatment for tuberculosis. With a median follow-up time of 69 months (range, 6-112 months; interquartile range, 23-87 months), 57 children (13.5%; 95% CI, 10.4%-17.2%) initiating treatment with efavirenz and 101 children (26.4%; 95% CI, 22.0%-31.1%) initiating treatment with nevirapine had virological failure. There were 11 children (2.6%; 95% CI, 1.3%-4.6%) receiving efavirenz and 20 children (5.2%; 95% CI, 3.2%-7.9%) receiving nevirapine who never achieved virological suppression. The Cox proportional hazard ratio for the combined virological failure end point was 2.0 (95% CI, 1.4-2.7; log rank P < .001, favoring efavirenz). None of the measured covariates affected the estimated hazard ratio in the multivariable analyses. Among children aged 3 to 16 years infected with HIV and treated at a clinic in Botswana, the use of efavirenz compared with nevirapine as initial antiretroviral treatment was associated with less virological failure. These findings may warrant additional research evaluating the use of efavirenz and nevirapine for pediatric patients.

14 August 2011 in Journal of Child & Adolescent Mental Health
Verified
Journal Article
Closed access
ELElizabeth Lowenthal
Elizabeth Lowenthal
KLKathy Lawler
Kathy Lawler
NHNurit Harari
Nurit Harari
LMLesedi Moamogwe
Lesedi Moamogwe
JMJaphter Masunge
Japhter Masunge
RGRobert Gross
Robert Gross
Objective: To determine the validity of the Pediatric Symptom Checklist (PSC), a brief measure of psychosocial health, for screening HIV+ Batswana children. Method: Setswana versions of the parent ...

15 August 2016 in JAIDS Journal of Acquired Immune Deficiency Syndromes
Verified
Journal Article
Closed access
HOHarriet Okatch
Harriet Okatch
KBKaylin Bs Beiter
Kaylin Bs Beiter
JEJessica Bs Eby
Jessica Bs Eby
JCJennifer Chapman
Jennifer Chapman
TMTafireyi MBChB Marukutira
Tafireyi MBChB Marukutira
ELElizabeth Lowenthal
Elizabeth Lowenthal
Pill counts with calculated adherence percentages are used in many settings to monitor adherence, but can be undermined by patients discarding pills to hide nonadherence. Pill counts suggesting that >100% of prescribed doses were taken can signal “pill dumping.” We defined “overadherence” among a cohort of 300 HIV-infected adolescents as having greater than one-third of pill counts with >100% adherence during a year of follow-up. Apparent overadherence was more common in those with virologic failure than in those with suppressed viral loads (33% vs 13%, χ2 P = 0.001). Pill count adherence repeatedly >100% may identify HIV-infected adolescents at increased risk of treatment failure.

23 June 2017 in AIDS Care
Verified
Journal Article
Closed access
EYElizabeth Yang
Elizabeth Yang
SMSeipone Mphele
Seipone Mphele
NMNeo Moshashane
Neo Moshashane
BBBoineelo Bula
Boineelo Bula
JCJennifer Chapman
Jennifer Chapman
ELElizabeth Lowenthal
Elizabeth Lowenthal
Levels of adherence to HIV treatment are lower among adolescents compared with older and younger individuals receiving similar therapies. We purposely sampled the most and least adherent adolescents from a 300-adolescent longitudinal HIV treatment adherence study in Gaborone, Botswana. Multiple objective and subjective measures of adherence were available and study participants were selected based on sustained patterns of either excellent or poor adherence over a one-year period. Focus group discussions (FGD) and in-depth interviews (IDI) were conducted with the adolescents and a subset of their caregivers with the goal of revealing barriers and facilitators of adherence. Focus groups were segregated by adherence classification of the participants. Following coding of transcripts, matrices were developed based on participants’ adherence classifications in order to clarify differences in themes generated by individuals with different adherence characteristics. 47 adolescents and 25 adults were included. The non-adherent adolescents were older than the adherent adolescents (median age 18 years (IQR 16–19) vs. 14 years (IQR 12–15 years)), with median time on treatment near 10 years in both groups. Interference with daily activities, concerns about stigma and discrimination, side effects, denial of HIV status, and food insecurity arose as challenges to adherence among both those who were consistently adherent and those who were poorly-adherent to their medications. Low outcome expectancy, treatment fatigue, mental health and substance use problems, and mismatches between desired and received social support were discussed only among poorly adherent adolescents and their caregivers. Challenges raised only among adolescents and caregivers in the non-adherent groups are hypothesis-generating, identifying areas that may have a greater contribution to poor outcomes than challenges faced by both adherent and non-adherent adolescents. The contribution of these factors to poor outcomes should be explored in future studies.