Kevin Stephenson

Dr. Kevin Stephenson


Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

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

Representative Publications

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24 March 2021 in Addiction Science & Clinical Practice
Verified
Journal Article
Open access
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TSTessa L. Steel
Tessa L. Steel
SGShewit P. Giovanni
Shewit P. Giovanni
SKSarah C. Katsandres
Sarah C. Katsandres
SCShawn M. Cohen
Shawn M. Cohen
KSKevin Stephenson
Kevin Stephenson
EWEmily C. Williams
Emily C. Williams
Background: The Clinical Institute Withdrawal Assessment for Alcohol-Revised (CIWA-Ar) is commonly used in hospitals to titrate medications for alcohol withdrawal syndrome (AWS), but may be difficult to apply to intensive care unit (ICU) patients who are too sick or otherwise unable to communicate. Objectives: To evaluate the frequency of CIWA-Ar monitoring among ICU patients with AWS and variation in CIWA-Ar monitoring across patient demographic and clinical characteristics. Methods: The study included all adults admitted to an ICU in 2017 after treatment for AWS in the Emergency Department of an academic hospital that standardly uses the CIWA-Ar to assess AWS severity and response to treatment. Demographic and clinical data, including Richmond Agitation-Sedation Scale (RASS) assessments (an alternative measure of agitation/sedation), were obtained via chart review. Associations between patient characteristics and CIWA-Ar monitoring were tested using logistic regression. Results: After treatment for AWS, only 56% (n = 54/97) of ICU patients were evaluated using the CIWA-Ar; 94% of patients had a documented RASS assessment (n = 91/97). Patients were significantly less likely to receive CIWA-Ar monitoring if they were intubated or identified as Black. Conclusions: CIWA-Ar monitoring was used inconsistently in ICU patients with AWS and completed less often in those who were intubated or identified as Black. These hypothesis-generating findings raise questions about the utility of the CIWA-Ar in ICU settings. Future studies should assess alternative measures for titrating AWS medications in the ICU that do not require verbal responses from patients and further explore the association of race with AWS monitoring.

17 February 2022 in BMJ Open
Verified
Journal Article
Open access
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JLJukka M Leppänen
Jukka M Leppänen
JBJulius Walker Butcher
Julius Walker Butcher
CGClaire Godbout
Claire Godbout
KSKevin Stephenson
Kevin Stephenson
David Taylor HendrixsonDavid Taylor Hendrixson
David Taylor Hendrixson
MMMark J Manary
Mark J Manary
Objectives To investigate the feasibility of eye-tracking-based testing of the speed of visual orienting in malnourished young children at rural clinics in Sierra Leone. Design Prospective dual cohort study nested in a cluster-randomised trial. Setting 8 sites participating in a cluster-randomised trial of supplementary feeding for moderate acute malnutrition (MAM). Participants For the MAM cohort, all infants aged 7–11 months at the eight sites were enrolled, 138 altogether. For controls, a convenience sample of all non-malnourished infants aged 7–11 months at the same sites were eligible, 60 altogether. A sample of 30 adults at the sites also underwent eye-tracking tests as a further control. Interventions Infants with MAM were provided with supplementary feeding. Outcome measures The primary outcomes were feasibility and reliability of eye-tracking-based testing of saccadic reaction time (SRT). Feasibility was assessed by the percent of successful tests in the infants. Reliability was measured with intraclass correlation coefficients (ICCs). Secondary outcomes were mean SRT based on nutritional state as well as and changes in mean SRT after supplementary feeding of MAM children. Results Infants exhibited consistent orienting to targets on a computer screen (>95% of valid trials). Mean SRTs had moderate stability within visits (ICCs 0.60–0.69) and across the 4-week test–retest interval (0.53) in infants; the adult control group had greater SRT stability (within visit ICC=0.92). MAM infants had a trend toward higher adjusted SRT at baseline (difference=12.4 ms, 95% CI −2 to 26.9, p=0.09) and improvement in SRT 4 weeks thereafter (difference=−14 ms, 95% CI −26.2 to −1.7, p=0.025) compared with age-matched controls. Conclusions The results demonstrate the feasibility of eye-tracking-based testing in a resource-poor field setting and suggest eye-tracking measures have utility in the detection of group level effects of supplementary feeding.

9 January 2023 in Foods
Verified
Journal Article
Open access
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GJGenevieve James
Genevieve James
KSKevin Stephenson
Kevin Stephenson
MCMeghan Callaghan-Gillespie
Meghan Callaghan-Gillespie
MKMohamed Tabita Kamara
Mohamed Tabita Kamara
HPHui Gyu Park
Hui Gyu Park
MMMark Manary
Mark Manary
Ready-to-use therapeutic food (RUTF) is used to treat young children diagnosed with severe acute malnutrition. RUTF with low and balanced linoleic and alpha-linolenic acid, plus omega-3 docosahexaenoic acid (DHA), supports long-term cognitive recovery. DHA is prone to degradation due to peroxidation, possibly exacerbated by the iron inherently in RUTF. Our goals were to prepare benchtop and manufacturing scale of RUTF formulations that include DHA and measure its retention. Twenty-seven RUTF formulas with base ingredients, including oats, high oleic or commodity peanuts, and encapsulated or oil-based DHA at various levels were prepared at benchtop scale, followed by seven months of climate-controlled storage. These pilot samples had similar relative DHA retention. At the manufacturing scale, DHA was added at one of two stages in the process, either at the initial or the final mixing stage. Samples taken at preliminary or later steps show that less than 20% of DHA added at the early stages disappeared prior to packaging for any recipe tested. Overall, our data indicate that most DHA included in RUTF is retained in the final product and that DHA is best retained when added at the latest manufacturing stage.

10 February 2024 in Children
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Journal Article
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AKAMINATA SHAMIT KOROMA
AMINATA SHAMIT KOROMA
KSKevin Stephenson
Kevin Stephenson
PIPer Ole Iversen
Per Ole Iversen
MMMark Manary
Mark Manary
David Taylor HendrixsonDavid Taylor Hendrixson
David Taylor Hendrixson
Breastfeeding provides optimal infant nutrition; however, <50% of infants are exclusively breastfed (EBF) for 6 months. We aimed to describe breastfeeding practices and their effects on growth and mortality among a high-risk mother-infant cohort in rural Sierra Leone. This was a secondary analysis of data from a randomized nutrition intervention trial among undernourished pregnant women. The study’s primary outcomes were infant weight and length gains at 6 weeks of age. We included 1270 singleton infants in the analysis, with 1092 (85.6%) having 24-week outcome data. At 6 weeks, 88% were EBF, but the rate of EBF decreased to 17% at 24 weeks. The EBF infants at 6 weeks had improved length (difference of 0.9 mm/week; 95% CI 0.4 to 1.3; p < 0.001) and weight (difference of 40 g/week; 95% CI 24 to 53; p < 0.001) gains compared to the non-EBF infants. At 12 weeks, the EBF infants had improved weight (difference of 12 g/week; 95% CI 2 to 22; p = 0.024) gain. The EBF infants had lower mortality than the infants who were not EBF (hazard ratio of 0.39; 95% CI 0.18 to 0.84; p = 0.017). In summary, the infants who were EBF had greater weight and length gain and reduced mortality than those who were not EBF. Efforts to improve breastfeeding should thus be prioritized to improve infant health.

9 August 2023 in The American Journal of Clinical Nutrition
Verified
Journal Article
Open access
KSKevin Stephenson
Kevin Stephenson
DWDonna R. Wegner
Donna R. Wegner
THTamara G. Hershey
Tamara G. Hershey
TDTasha Doty
Tasha Doty
EDEphious Davis
Ephious Davis
MMMark Manary
Mark Manary
Few studies have investigated the role of school feeding in low- and middle-income countries as a means of improving childhood cognition. Peanut/milk ready-to-use food (PM-RUF) or cowpea offers an affordable, scalable option that might improve cognition. To determine whether micronutrient-fortified PM-RUF or peanut/cowpea ready-to-use food (PC-RUF) would improve fluid cognition as assessed by 4 tests from the National Institutes of Health Toolbox Cognitive Battery when compared with a micronutrient-fortified millet porridge (FP) after a year of school feeding. An individually randomly assigned, investigator-blinded, controlled clinical trial was conducted at 6 schools in Mion District in rural northern Ghana. Eight hundred seventy-one school children aged 5-12 y were randomly assigned and allocated to receive PM-RUF (n = 282), PC-RUF (n = 292), or FP (n = 297), each providing ∼400 kcal/d. The primary outcomes were 4 fluid cognition test scores: Dimensional Change Card Sort test, Flanker Inhibitory Control and Attention test, Pattern Comparison Processing Speed test, and a modified List Sorting Working Memory test. Secondary outcomes included a composite median ranking of the 4 primary outcomes and anthropometry changes. Among the 871 participants (median age, 8.8 y; 47% female), 795 (91%) completed endline cognitive testing. Median attendance rates exceeded 87% in all groups. PM-RUF group demonstrated better fluid cognition on the Dimensional Change Card Sort test [odds ratio (OR): 1.5; 95% CI: 1.1, 2.0; P = 0.016] and Pattern Comparison Processing Speed test (OR: 1.4; 95% CI: 1.0, 1.9; P = 0.026) than FP, whereas there were no significant differences on Flanker Inhibitory Control and Attention or List Sorting Working Memory tests. PC-RUF group demonstrated no improvement over FP on any cognitive tests. PM-RUF group had superior fluid cognition composite median rankings (OR: 1.5; 95% CI: 1.1, 2.0; P = 0.007). Among rural Ghanaian children aged 5-12 y, PM-RUF compared with FP resulted in superior fluid cognition. This trial was registered at clinicaltrials.gov as NCT04349007.

2 December 2024 in Maternal & Child Nutrition
Verified
Journal Article
Open access
GHGrace Heymsfield
Grace Heymsfield
KSKevin Stephenson
Kevin Stephenson
ZTZachary Tausanovitch
Zachary Tausanovitch
ABAndré BRIEND
André BRIEND
Marko KeracMarko Kerac
Marko Kerac
Suvi T KangasSuvi T Kangas
Suvi T Kangas
A simplified, combined protocol treats children with moderate acute malnutrition (MAM), defined by mid‐upper arm circumference (MUAC) of < 125 and ≥ 115 mm and no oedema, with 1 daily sachet of ready‐to‐use therapeutic food (RUTF) and those with severe acute malnutrition (SAM), defined by MUAC < 115 mm and/or oedema, with two daily sachets of RUTF. This protocol was previously shown to result in non‐inferior recovery compared to standard treatment that used higher, weight‐based RUTF dosing among children with SAM and ready‐to‐use supplementary food (RUSF) for MAM in a cluster‐based randomised controlled trial in Kenya and South Sudan. We conducted a secondary analysis of this trial to compare linear growth among children admitted with MUAC < 115 mm. Linear and ponderal growth were calculated from admission to discharge and visualised using aggregate growth curves. HAZ change adjusted for admission characteristics was negative across the course of treatment but similar across arms [−0.21 ± 0.18 SE in the standard arm, −0.24 ± 0.18 SE in simplified; difference (95% confidence interval) 0.03 (−0.12, 0.18)]. The unadjusted mean ± SE linear growth velocity from admission to discharge was 1.8 ± 0.7 mm/week in the standard arm compared to 1.7 ± 0.7 mm/week in the simplified arm [difference = 0.09 (−0.36, 0.53)] and similar in adjusted analysis. MUAC and weight gain velocities were not significantly different by treatment arm. Reducing the RUTF dose prescribed to children during SAM treatment does not appear to affect linear growth or other growth velocities during treatment.