Kaley Lambden’s research while affiliated with Johns Hopkins Bloomberg School of Public Health and other places

Undernutrition and a lack of learning opportunities can jeopardize long-term growth and development among infants in low- and middle-income countries. We conducted a 6-month 2 × 2 cluster-randomized trial to assess the effects of multiple micronutrient-fortified beverages and responsive caregiving interventions among infants 6–18 months in 72 community sectors in southwest Guatemala. We administered baseline and endline assessments of childhood development (Bayley Scales of Infant and Toddler Development) and socioemotional development (Brief Infant Toddler Socio-Emotional Assessment) and measured ferritin and hemoglobin on a subsample. The trial was analyzed using linear mixed models. At the baseline, the mean age (SD) was 13.0 (4.6) months, including 49% males, 32% who were stunted, 55% who were anemic, and 58% who were iron deficient. At the endline (n = 328/386, 85% retention), there was no synergistic effect on the fortified beverage and responsive caregiving intervention. Compared to the non-fortified beverage group, socioemotional development improved in the fortified beverage group. There were no intervention effects on other measures of child development, hemoglobin, or ferritin. In a setting with high rates of anemia and iron deficiency, a multiple micronutrient-fortified beverage improved infants’ socioemotional development.

Background Symptom control among cancer patients is a Tanzanian public health priority impacted by limited access to palliative care (PC) specialists and resources. Mobile Palliative Care Link (mPCL), a mobile/web application, aims to extend specialist access via shared care with local health workers (LHWs) with the African Palliative care Outcome Scale (POS) adapted for regular, automated symptom assessment as a core feature. Objective The aim of the study is to assess clinicians' attitudes, beliefs, and perceptions regarding mPCL usability and utility with their patients within a government-supported, urban Tanzanian cancer hospital setting. Methods We used a mixed methods approach including surveys, qualitative interviews, and system usage data to assess clinicians' experience with mPCL in a field study where discharged, untreatable cancer patients were randomized to mPCL or phone-contact POS collection. Results All six specialists and 10 LHWs expressed overall satisfaction with mPCL among 49 intervention arm patients. They perceived mPCL as a way to stay connected with patients and support remote symptom control. Timely access to POS responses and medical records were identified as key benefits. Some differences in perceptions of mPCL use and utility were seen between clinician groups; however, both expressed strong interest in continuing app use, recommending it to colleagues, and extending use throughout Tanzania. Primary use was for clinical status communication and care coordination. Pain and other symptom progression were the most frequently reported reasons for provider–patient interactions accounting for 34% (n = 44) and 12% (n = 15) of reasons, respectively. Usage barriers included time required to create a new clinical record, perceived need for response to non-urgent reminders or alerts, and training. necessary for competent use. System-level implementation barriers included variable patient access to smartphones and SIM cards and unreliable Internet access. Conclusion This work demonstrates broad clinician desire for digital health tools to support remote community-based PC among cancer patients, particularly pain management.

PURPOSE Late-stage cancer patient symptom control is a national priority in Tanzania. Mobile health promises to improve the reach of a limited pool of palliative care specialists through interprofessional, community-based care coordination. This work assessed the effectiveness of a smartphone- or Web-based app, mPalliative Care Link (mPCL), to extend specialist access via shared data and communication with local health workers. Central to mPCL is the African Palliative care Outcome Scale (POS), adapted for automated mobile symptom assessment and response. METHODS Adult patients with incurable cancer were randomly assigned at hospital discharge to mPCL versus phone-contact POS collection. Sociodemographic, clinical, and POS data were obtained at baseline. Twice-weekly POS responses were collected and managed via mPCL or phone contact with clinician study personnel for up to 4 months, on the basis of study arm assignment. Patient end-of-study care satisfaction was assessed via phone survey. RESULTS Forty-nine patients per arm participated. Comparison of baseline characteristics showed an insignificant trend toward more women ( P = .07) and higher discharge morphine use ( P = .09) in the mPCL group compared with phone-contact and significant between-group differences in cancer types ( P = .003). Proportions of deaths were near equal between groups (mPCL: 27%; phone-contact: 29%). Overall symptom severity was significantly lower in the phone-contact group ( P < .0001), and symptom severity decreased over time in both groups ( P = .0001); however, between-group change in overall symptoms over time did not vary significantly ( P = .34). Care satisfaction was generally high in both groups. CONCLUSION Higher symptom severity scores in the mPCL arm likely reflect between-group sociodemographic and clinical differences and clinical support of phone-contact arm participants. Similar rates of care satisfaction in both groups suggest that mPCL may support symptom-focused care coordination in a more efficient and scalable manner than phone contact. A broader study of mPCL's cost efficiency and utility in Tanzania is needed.

1584 Background: Cancer is a growing public health concern in Tanzania (and throughout sub-Saharan Africa), with a majority of cases presenting in late stage with associated distress, ie, pain. Access to specialty palliative care (PC) is a national priority in Tanzania; however, there are limited numbers of PC specialists (hereafter, specialists). Mobile health promises to extend the reach of a limited pool of specialists through inter-professional, community-based care coordination. This work assessed the effectiveness of a smartphone-/web-based application, mobile Palliative Care Link (mPCL), to extend specialist access via shared data and communication with local health workers (LHWs). Central to mPCL is the African Palliative care Outcome Scale (POS), adapted for automated, scheduled mobile symptom assessment and response. Methods: Following consent, incurable adult cancer patients were randomized at hospital discharge from a large urban, government-supported Tanzanian cancer institute to one of two study arms—mPCL or phone-contact POS collection. Baseline sociodemographic, clinical and POS data were recorded. Twice-weekly POS responses were collected and managed via mPCL or by phone-contact with clinician study personnel for up to 4-months depending on respective study arm. Patient end-of-study care satisfaction was assessed via phone-survey. Results: Forty-nine patients per arm participated. Comparison of baseline characteristics showed a trend toward more women ( p= 0.07) and higher discharge morphine use ( p= 0.09) in the mPCL versus phone-contact groups, respectively, and significant between-group differences in cancer types ( p= 0.003). Proportion of deaths were near-equal comparing groups [26% ( n= 13) mPCL versus 28% ( n= 14) phone-contact]. Overall symptom severity was lower in the phone-contact group ( p <0.0001) and symptom severity decreased over time in both groups ( p= 0.0001); however, between-group change in overall symptoms over time did not vary ( p= 0.34). Care satisfaction was high overall in both groups with few between-groups differences, ie, greater provider response to questions and concerns in the phone-contact arm and greater provision of spiritual support in the mPCL arm. Conclusions: Higher symptom severity scores in the mPCL arm likely reflecting between-group sociodemographic/clinical differences and clinical support of phone-contact arm participants. Similar rates of care satisfaction in both groups suggest that, compared to phone-based support, mPCL may facilitate effective symptom-focused care in a more efficient and scalable manner. Study limitations include a small sample of patients from a single urban hospital and lack of a true usual care arm. Broader study of mPCL’s cost-efficiency and utility in Tanzania is needed. This work promises to close a large PC gap in under-resourced settings throughout Tanzania and other LMICs.

Background Improving access to end-of-life symptom control interventions among cancer patients is a public health priority in Tanzania, and innovative community-based solutions are needed. Mobile health technology holds promise; however, existing resources are limited, and outpatient access to palliative care specialists is poor. A mobile platform that extends palliative care specialist access via shared care with community-based local health workers (LHWs) and provides remote support for pain and other symptom management can address this care gap. Objective The aim of this study is to design and develop mobile-Palliative Care Link (mPCL), a web and mobile app to support outpatient symptom assessment and care coordination and control, with a focus on pain. Methods A human-centered iterative design framework was used to develop the mPCL prototype for use by Tanzanian palliative care specialists (physicians and nurses trained in palliative care), poor-prognosis cancer patients and their lay caregivers (patients and caregivers), and LHWs. Central to mPCL is the validated African Palliative Care Outcome Scale (POS), which was adapted for automated, twice-weekly collection of quality of life–focused patient and caregiver responses and timely review, reaction, and tracking by specialists and LHWs. Prototype usability testing sessions were conducted in person with 21 key informants representing target end users. Sessions consisted of direct observations and qualitative and quantitative feedback on app ease of use and recommendations for improvement. Results were applied to optimize the prototype for subsequent real-world testing. Early pilot testing was conducted by deploying the app among 10 patients and caregivers, randomized to mPCL use versus phone-contact POS collection, and then gathering specialist and study team feedback to further optimize the prototype for a broader randomized field study to examine the app’s effectiveness in symptom control among cancer patients. Results mPCL functionalities include the ability to create and update a synoptic clinical record, regular real-time symptom assessment, patient or caregiver and care team communication and care coordination, symptom-focused educational resources, and ready access to emergency phone contact with a care team member. Results from the usability and pilot testing demonstrated that all users were able to successfully navigate the app, and feedback suggests that mPCL has clinical utility. User-informed recommendations included further improvement in app navigation, simplification of patient and caregiver components and language, and delineation of user roles. Conclusions We designed, built, and tested a usable, functional mobile app prototype that supports outpatient palliative care for Tanzanian patients with cancer. mPCL is expressly designed to facilitate coordinated care via customized interfaces supporting core users—patients or caregivers, LHWs, and members of the palliative care team—and their respective roles. Future work is needed to demonstrate the effectiveness and sustainability of mPCL to remotely support the symptom control needs of Tanzanian cancer patients, particularly in harder-to-reach areas.

BACKGROUND Improving access to end-of-life symptom control interventions among cancer patients is a public health priority in Tanzania in need of innovative community-based solutions. Mobile health technology holds promise; however, existing resources are limited and access to palliative care specialists (hereafter, specialists) is poor. A mobile platform that extends specialist access via shared care with community-based local health workers (LHWs) and provides remote support for pain and symptom management can address this gap in care, particularly in low-resource settings. OBJECTIVE The aim of this study was to design and develop mobile-Palliative Care Link (mPCL), a mobile/web application to support symptom assessment and care coordination and control, with a focus on pain. METHODS A human-centered iterative design framework was used to develop the mPCL prototype for use by specialists (palliative care physicians and nurses), poor-prognosis cancer patients and their lay caregivers (patients/caregivers), and LHWs. Central to mPCL is the validated patient-focused African Palliative care Outcome Scale (POS), adapted for automated, twice-weekly collection of patient/caregiver responses, and timely review, reaction and tracking by specialists and LHWs. Prototype usability testing sessions were conducted in person in a controlled setting with 21 key informants representing target end users. Sessions consisted of direct observations and qualitative feedback on ease-of-use and recommendations for improvement. Results were used to build a usable, functional prototype for subsequent real-world testing. Early pilot testing was conducted by deploying the application among ten patients/caregivers, randomized to mPCL use versus phone-contact POS collection, and then gathering feedback from the specialists, LHWs and nurses who used mPCL to manage care. This feedback was employed to further optimize the application for a broader randomized field study to examine the application’s effectiveness in symptom control among cancer patients. RESULTS mPCL functionalities include the ability to create and update a synoptic clinical record; regular real-time symptom assessment; patient/caregiver and care team communication and care coordination; symptom-focused educational resources; and easy access to emergency contact information. Results from usability and pilot testing demonstrated that all users were able to successfully navigate the application and feedback suggests that mPCL has clinical utility. User-informed recommendations included: further improvement in navigation of the application, simplification of patient/caregiver components and language, and delineation of user roles. CONCLUSIONS We designed, built, and tested a usable, functional prototype of a mobile application supporting palliative care for cancer patients in Tanzania. mPCL is expressly designed to support coordinated care via customized interfaces supporting core users—patients/caregivers, LHWs and members of the palliative care team—and their respective roles. Future work is needed to demonstrate the effectiveness and sustainability of mPCL to remotely support symptom control needs of Tanzanian cancer patients, particularly in harder-to-reach areas.

One in four children younger than age five in Guatemala experiences anaemia (haemoglobin <11.0 g/dl). This study characterized the factors and micronutrient deficiencies associated with anaemia in a baseline cross-sectional sample of 182 Guatemalan infants/toddlers and 207 preschoolers, using generalized linear mixed models. Associations between anaemia and maternal, child and household variables, and biomarkers (soluble transferrin receptor, ferritin, zinc, folate, vitamin B12, C-reactive protein, and α1-acid glycoprotein) were explored. Rates of anaemia were 56% among infants/toddlers and 12.1% among preschoolers. In children with anaemia, rates of iron deficiency (low ferritin based on inflammation status, and/or high soluble transferrin receptor, ≥1.97 mg/L) and zinc deficiency (serum zinc <65 μg/dl) were 81.1% and 53.7%, respectively. Folate deficiency (either plasma folate <3 ng/ml or erythrocyte folate <100 ng/ml) was 3.3%. Vitamin B12 deficiency (plasma vitamin B12 <148 pmol/L) was 7.5%. For infants and toddlers (<24 months), the odds ratio of anaemia was lower when higher number of adults lived in the household (OR = 0.69; 95% CI [0.53, 0.90]), and higher when children were zinc deficient (OR = 3.40; 95% CI [1.54, 7.47]). For preschoolers (36-60 months), the odds ratio of anaemia was lower for every additional month of age (OR = 0.90; 95% CI [0.81, 1.00]). Findings suggest that micronutrient deficiencies coexist in Guatemalan rural children, and zinc deficiency is associated with anaemia in children <24 months, highlighting the need of continued multidisciplinary interventions with multiple micronutrients. Further research examining how household composition, feeding practices, and accessibility to micronutrient supplements and to animal source foods is needed to incorporate strategies to improve the nutritional status of Guatemalan children.

Objectives: Anemia is a major public health problem among young children. In addition to iron deficiency, other micronutrient deficiencies have been associated with anemia. The purpose of this study was to identify biomarkers associated with anemia in children <5 years from rural Guatemala. Methods: A total of 182 infants (6-24 m) and 207 preschoolers (36-60 m) were recruited from community surveillance to participate in a randomized controlled trial of nutrition and child development. Methods included measured weight, length/height and venous blood draws. Inclusion criteria were length/height-for-age z-score <-1.0 and Hb >7.0 g/dL. Cross-sectional analyses using generalized linear mixed models of baseline data examined associations between anemia (Hb <11.0 g/dL) and micronutrient deficiencies, adjusting for maternal, child and sociodemographic variables. Iron deficiency was defined as low ferritin based on inflammation status, and/or high soluble transferrin receptor, ≥1.97 mg/L. Deficiencies for other parameters were designated as: zinc <65 µg/dL; vitamin B12 < 200 pg/mL; and plasma folate <3 ng/mL or erythrocyte folate <100 ng/mL. Results: Prevalence of anemia was 56% in infants and 12% in preschoolers. Among anemic infants/preschoolers, rates of iron, zinc, folate and vitamin B12 deficiencies were 83/75%; 63/18%; 3/4%; and 9/0%, respectively. For infants, the odds of anemia were higher when children were zinc deficient [OR = 3.59;95%CI (1.64-7.85)], after adjusting for community cluster, sex, age, maternal education and household size. No biomarkers were associated with anemia in preschoolers. Conclusions: Iron and zinc are common micronutrient deficiencies in children from low- and middle-income countries. These findings suggest that micronutrient deficiencies coexist among children in Guatemala, and that zinc should be considered as part of the prevention strategies to reduce anemia. In preschoolers, no biomarkers were associated with anemia, suggesting that other biological and psychosocial factors could be influencing anemia in this age group. Funding sources: The Mathile Institute for the Advancement of Human Nutrition, Sackler Institute for Nutrition Science of the New York Academy of Sciences.