Nutrition and health: Suboptimal thiamin status is common in Cambodian women of childbearing age
-
Upload
ifsd14 -
Category
Government & Nonprofit
-
view
328 -
download
1
description
Transcript of Nutrition and health: Suboptimal thiamin status is common in Cambodian women of childbearing age
Suboptimal thiamin status is common in Cambodian women of childbearing age
Whitfield, KC, Liu, Y, Karakochuk, CD, Talukder, A, Kroeun, H, Kevanna, O, Kitts, DD, Li-Chan, ECY, McLean, J, Green TJ
Sponsored by Hosted by
Presented at the International Food Security Dialogue 2014
Enhancing Food Production, Gender Equity and Nutritional Security in a Changing World
Under-nutrition measures for women and children in Africa and Asia
The Fish on Farms project is being jointly conducted by the University of
British Columbia (UBC) and Helen Keller International (HKI), with technical assistance from World Fish, in Prey Veng Province, Cambodia.
This randomized control trial investigates an integrated Homestead Food Production models in relation to poverty, gender empowerment, and food
and nutrition security, particularly among women and children.
This is the first project known to rigorously measure the effectiveness of different models of Homestead Food Production at reducing undernutrition
using biochemical and anthropometric measurements.
University of British Columbia Ministry of Health, Cambodia Dr. Tim Green, Associate Professor, Human Nutrition Ministry of Planning, Cambodia Dr. Judy McLean, Assistant Professor, Human Nutrition Dr. Susan Barr, Professor, Human Nutrition Dr. Larry Lynd, Professor & Director, Collaboration for Outcomes Research & Evaluation Dr. Tony Farrell, Professor, Centre for Aquaculture and Environmental Research Dr. David Kitts, Professor, Food Science & Associate Dean of Research Dr. Ian Forster, Centre for Aquaculture and Environmental Research Jen Foley, Fish on Farms Program Coordinator
Helen Keller International - Cambodia Graduate Students Dr. Zaman Talukder Kyly Whitfield (PhD, Nutrition) Mr. Hou Kroeun Crystal Karakochuk (PhD, Nutrition) Ms. Ly Sokhoing Vashti Verbowski (MSc, Nutrition) Field Research Team Pardis Lakzadeh (MSc, Public Health)
Jeff Tang (BSc, Science)
Karen People of Mae La Refugee Camp
• Thai-Burmese border; settled in 1986
• High infant mortality rate unrelated to major killers • diarrhea and respiratory illness
• Between 1987 – 1990, infantile beriberi caused 40% of all infant deaths
McGready et al 2001; Luxemburger et al 2003; Stuetz et al 2012
Background: Thiamin • Vitamin B1 • Thiamin diphosphate (TDP)
plays major role in carbohydrate metabolism • Pentose-Phosphate Pathway • Kreb’s Cycle
• Modulates neuronal and neuro-muscular transmissions
Images from: Beltramo, E (2011)
Infantile beriberi • Stems from thiamin (vitamin B1)
deficiency
• Symptoms • signs of right-sided heart failure • rapid breathing • generalized edema • distinctive, hoarse cry
• Presents around 3 months of age • Infant AI: 0.2 mg/day
• AI based on [breast milk thiamin] from apparently replete women
• Root cause: maternal thiamin deficiency
Thiamin deficiency
© Kyly Whitfield 2012
Rationale
Research question
What is the current level of thiamin
deficiency among women of childbearing age (20-45y) in rural and urban Cambodia?
© Kyly Whitfield 2013
Regional (urban/rural) n=160 per region
16 villages per region
10 women per village
Protocol
Purposeful Selection
Random Selection: Lists
Random Selection: Draw
Protocol
© Kyly Whitfield 2013
© Kyly Whitfield 2013
© Kyly Whitfield 2013
Protocol
© Kyly Whitfield 2014
Results
Phnom Penh (n=146)
Prey Veng (n=156)
Vancouver (n=50)
Age (years; mean±SD) 32.6 ± 7.2 35.1 ± 6.3 26.4 ± 4.6
Body Mass Index (kg/m2; mean±SD) 23.4 ± 4.1 21.6 ± 2.9 22.4 ± 3.8
Ethnicity Khmer Caucasian Non-Caucasian
146 (100%)
- -
156 (100%)
- -
-
34 (68%) 16 (32%)
Thiamin deficiency cut-offs
Thiamin Deficiency Status Thiamin Diphosphate (TDP; nmol/L)
Sufficient > 90 Marginally Deficient 70 - 90
Deficient < 70
• Measured using high performance liquid chromatography (HPLC)
61%
41%
84%
27%
35%
12% 12%
24%
4%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Phnom Penh (urban Cambodia)
Prey Veng (rural Cambodia)
Vancouver (urban Canada)
Results
59% 39%
n=146 n=156 n=50
Results
Population Mean TDP ± SD (nmol/L)
Range (nmol/L)
Phnom Penh (urban Cambodia) 100 ± 28 40 - 195
Prey Veng (rural Cambodia) 87 ± 26 38 - 191
Vancouver (urban Canada) 128 ± 38 42 - 213
What next?
© Kyly Whitfield 2013
Randomized Control Trial
Rationale
Need to improve maternal thiamin status to decrease the incidence of infantile beriberi
Infantile Beriberi
• change dietary behaviours • supplementation • food fortification
Overall Objective
Develop a thiamin-fortified product that, when
consumed by women of childbearing age, increases
thiamin in women’s blood to a level consistent with a low
risk of infantile beriberi.
© Kyly Whitfield 2013
Fortified fish sauce
Protocol
Best option? There are many condiments that could be fortified
Results
Fish Paste Number of Participants % Purchase fish paste at market 144 of 320 45%
No brand 144 of 144 100%
Salt Number of Participants % Purchase salt at market 319 of 320 99%
No brand 173 of 319 54%
Fish Sauce Number of Participants % Purchase fish sauce market 202 of 320 63%
No brand 26 of 202 13%
Intervention
© Kyly Whitfield 2013
Fish Sauce Fortification
© Kyly Whitfield 2013
© Kyly Whitfield 2013
Fish Sauce Fortification
© Kyly Whitfield 2013
© Kyly Whitfield 2013
Randomized Control Trial
6 month, 3 armed, double blind randomized control trial
Intervention A:
8 mg/mL thiamin fortified fish sauce
Intervention B:
2 mg/mL thiamin fortified fish sauce
Control:
Placebo fish sauce
Intervention Arms: RCT
Placebo
Intervention © Kyly Whitfield 2013
Potential Significance
• Potential to significantly decrease thiamin deficiency in Cambodia, which in turn will lower the risk of infantile beriberi
• Possibility of scaling up the production and distribution of
fortified product throughout Cambodia • Potential for multiple micronutrient fortification; for example:
riboflavin
Thank you!