10.17037/DATA.00003400
The Alleviating Hidden Hunger with Agronomy (AHHA) Malawi trial sought to test the efficacy of alleviating selenium deficiency through consumption of maize flour enriched with fertilizers in a Malawi-based context. The anonymised dataset contains outcome results of the investigation. This dataset is an update to the version published at 10.17037/DATA.00003123.
Participant demographic information, morbidity outcomes and dietary information were captured through interviewer-administered questionnaires. Blood haemoglobin concentrations were measured in the field by trained Research Assistants. Serum selenium concentrations were measured by ICPMS.
Selenium, Agronomic Biofortification, Maize
English
Project name | Funder/sponsor | Grant number | Notes |
Can dietary mineral deficiencies in a rural Malawi population be improved through the consumption of maize flour enriched using micronutrient fertilizers? | Bill & Melinda Gates Foundation | INV-009129 | ISRCTN85899451 10.1186/ISRCTN85899451 |
This dataset is an update to the version published at 10.17037/DATA.00003123.
Forename | Surname | Faculty / Dept | Institution | Role | ORCID |
Edward | Joy | Faculty of Epidemiology and Population Health / Department of Population Health | London School of Hygiene & Tropical Medicine | Data Creator | 0000-0002-0106-866X |
Joanna | Sturgess | Faculty of Epidemiology and Population Health / Department of Medical Statistics | London School of Hygiene & Tropical Medicine | Data Creator | 0000-0001-7312-4598 |
Elizabeth | Allen | Faculty of Epidemiology and Population Health / Department of Medical Statistics | London School of Hygiene & Tropical Medicine | 0000-0002-2689-6939 |
Filename | Description | Access status | Licence |
AHHA-Malawi-dataset-v3 | AHHA Malawi trial results dataset version 3 | Open | Creative Commons Attribution (CCBY) |
AHHA-Malawi-dataset-v3-codebook | Codebook for AHHA Malawi trial results dataset | Open | Creative Commons Attribution (CCBY) |
The third version of the AHHA Malawi Trial dataset contains the following variables.
Variable Name | Variable Label | Answer Label | Answer Code | Variable Type |
participantlabel | Participant ID number | Numeric | ||
group | Group | Numeric | ||
1 | ||||
0 | ||||
hh | Household ID group | Open ended | Numeric | |
adult_child | Demographic group | String | ||
Adult | ||||
Child | ||||
age_group | Age group | Numeric | ||
5-10 years | 1 | |||
20-29 years | 2 | |||
30-39 years | 3 | |||
40 years or over | 4 | |||
se_base | plasma selenium concentration at baseline, µg/L | String | ||
Not applicable | NA | |||
se_end | plasma selenium concentration at endline, µg/L | String | ||
hb_base | whole blood haemoglobin concentration at baseline, g/dL | String | ||
Not applicable | NA | |||
hb_end | whole blood haemoglobin concentration at endline, g/dL | String | ||
Not applicable | NA | |||
diarrhoea | Has the participant suffered diarrhoea in the past two weeks? Diarrhoea is defined as 3 or more watery stools over a 24 hour period | String | ||
Not applicable | NA | |||
No | No | |||
Not sure | Not sure | |||
Yes | Yes | |||
maxstools | What is the maximum number of stools in a 24 hour period during the diarrhoeal episode? | String | ||
Not applicable | NA | |||
3 | 3 | |||
4 to 5 | 4 to 5 | |||
6 to 7 | 6 to 7 | |||
diarrhoea_prolonged | Did the diarrhoea last between 7-13 days? | String | ||
Yes | Yes | |||
No | No | |||
Not sure | Not sure | |||
NULL | Not completed | |||
String | ||||
diarrhoea_blood | Did the participant have any blood in their stools? | String | ||
Yes | Yes | |||
No | No | |||
NULL | Not completed | |||
fever | Has the participant suffered fever in the past 2 weeks? Fever is defined as a high temperature | String | ||
Fever for 1–2 days | Fever for 1–2 days | |||
Fever for 3–4 days | Fever for 3–4 days | |||
Fever for 5+ days | Fever for 5+ days | |||
No fever | No fever | |||
Not sure/would rather not say | Not sure/would rather not say | |||
NULL | Not completed | |||
vomiting | Has the participant suffered vomiting in the past 2 weeks? | String | ||
Vomiting for 1–2 days | Vomiting for 1–2 days | |||
Vomiting for 3–4 days | Vomiting for 3–4 days | |||
Not sure/would rather not say | Not sure/would rather not say | |||
No vomiting | No vomiting | |||
NULL | Not completed | |||
cough | Has the participant had an illness with a cough at any time in the last 2 weeks? | String | ||
Yes | Yes | |||
No | No | |||
Not sure | Not sure | |||
Would rather not say | Would rather not say | |||
NULL | Not completed | |||
breathing | Has the participant had fast, short, rapid breaths or difficulty breathing at any time in the last 2 weeks? | String | ||
Yes | Yes | |||
No | No | |||
Not sure | Not sure | |||
Would rather not say | Would rather not say | |||
NULL | Not completed | |||
chest | Was the fast or difficult breathing due to a problem in the chest or to a blocked or runny nose? | String | ||
Both | Both | |||
Chest only | Chest only | |||
Don't know/would rather not say | Don't know/would rather not say | |||
Nose only | Nose only | |||
Other (specify) | Other | |||
NULL | Not completed | |||
seintakebasevisit1 | dietary selenium intake at baseline, µg/day | String | ||
seintakebaserepeat | dietary selenium intake at baseline at repeat visit for randomly-selected subset, µg/day | String | ||
seintakeend | dietary selenium intake at endline, µg/day | String | ||
seintakeendrepeat | dietary selenium intake at endline at repeat visit for randomly-selected subset, µg/day | String | ||
pregnantend | self-reported pregnancy status | String | ||
y | Yes | |||
NULL | Not completed | |||
lactatingend | self-reported lactation status | String | ||
y | Yes | |||
NULL | Not completed | |||
FER_base_ugL | Serum ferritin concentration at baseline | String | ||
sTFR_base_mgL | Serum transferrin receptor concentration at baseline | String | ||
BodyIronStores_base_mgkgbodyweig | Body iron stores | String | ||
RBP_base_RE_umolL | Retinol binding protein at baseline | String | ||
CRP_base_mgL | C-reactive protein concentration at baseline | String | ||
AGP_base_gL | Αlpha-1-acid glycoprotein concentration at baseline | String | ||
FER_end_ugL | Serum ferritin concentration at endline | String | ||
sTFR_end_mgL | Serum transferrin receptor concentration at endline | String | ||
BodyIronStores_end_mgkgbodyweig | Body iron stores | String | ||
RBP_end_RE_umolL | Retinol binding protein at endline | String | ||
CRP_end_mgL | C-reactive protein concentration at endline | String | ||
AGP_end_gL | Αlpha-1-acid glycoprotein concentration at endline | String | ||
hh_adults | Number of adults in household | Open ended | Numeric | |
children_over_1 | Number of children over 1 in household | Open ended | Numeric | |
total_hh | Total number in household | Open ended | Numeric | |
water | What is the main source of water for the dwelling? | Numeric | ||
Piped into dwelling | 1 | |||
Piped to yard | 2 | |||
Piped to neighbour | 3 | |||
Public tap stand | 4 | |||
Tube well or borehole | 5 | |||
Protected well | 6 | |||
Unprotected well | 7 | |||
Unprotected spring | 8 | |||
Surface water (river/dam/lake/pond/stream/canal/irrigation channel) | 9 | |||
Other | 10 | |||
toilet | What toilet facilities does the household use? | Numeric | ||
Ventilated imporved pit latrine | 1 | |||
Pit latrine with slab | 2 | |||
Pit latrine without slab/open pit | 3 | |||
No facility/bush/field | 4 | |||
Pit latrine with slab - shared | 5 | |||
Pit latrine without slab/open pit - shared | 6 | |||
Other | 7 | |||
fuel | What is the main cooking fuel used in the household? | Numeric | ||
Electricity | 1 | |||
Charcoal | 2 | |||
Wood | 3 | |||
Grass/straw/shrubs | 4 | |||
Other | 5 | |||
floor | What is the main floor material of the household? | Numeric | ||
Earth/sand | 1 | |||
Dung | 2 | |||
Cement | 3 | |||
Other | 4 | |||
roof | What is the main roof material of the household? | Numeric | ||
No roof | 1 | |||
Thatch | 2 | |||
Palm/bamboo | 3 | |||
Metal | 4 | |||
Wood | 5 | |||
Other | 6 | |||
wall | What is the main wall material of the household? | Numeric | ||
Uncovered adobe (wood plastered with mud) | 1 | |||
Covered adobe (wood plastered with mud, with paint or wall paper) | 2 | |||
Bricks | 3 | |||
Other | 4 | |||
electric | Electricity | Numeric | ||
Yes | 1 | |||
No | 2 | |||
radio | Radio | Numeric | ||
Yes | 1 | |||
No | 2 | |||
tv | Television | Numeric | ||
Yes | 1 | |||
No | 2 | |||
telephone | Telephone (not mobile) | Numeric | ||
Yes | 1 | |||
No | 2 | |||
compupter | Computer | Numeric | ||
Yes | 1 | |||
No | 2 | |||
fridge | Refrigerator | Numeric | ||
Yes | 1 | |||
No | 2 | |||
kolo | Koloboyi | Numeric | ||
Yes | 1 | |||
No | 2 | |||
paraffin | Paraffin lamp | Numeric | ||
Yes | 1 | |||
No | 2 | |||
lamp | Lamp/torch | Numeric | ||
Yes | 1 | |||
No | 2 | |||
bed | Bed with matress | Numeric | ||
Yes | 1 | |||
No | 2 | |||
sofa | Sofa set | Numeric | ||
Yes | 1 | |||
No | 2 | |||
watch | Watch | Numeric | ||
Yes | 1 | |||
No | 2 | |||
mobile | Mobile telephone | Numeric | ||
Yes | 1 | |||
No | 2 | |||
bike | Bicycle | Numeric | ||
Yes | 1 | |||
No | 2 | |||
motorbike | Motorbike or scooter | Numeric | ||
Yes | 1 | |||
No | 2 | |||
cart | Animal-drawn cart | Numeric | ||
Yes | 1 | |||
No | 2 | |||
car | Car or truck | Numeric | ||
Yes | 1 | |||
No | 2 | |||
boat | Boat with a motor | Numeric | ||
Yes | 1 | |||
No | 2 | |||
bank | Bank account | Numeric | ||
Yes | 1 | |||
No | 2 | |||
own_home | Does the household own their house? | Numeric | ||
Yes | 1 | |||
No | 2 | |||
own_land | Does the household own land? | Numeric | ||
Yes | 1 | |||
No | 2 | |||
land_area | What area of land does the household own? | Numeric | ||
<0.5 hectares | 1 | |||
0.5-2 hectares | 2 | |||
2-5 hectares | 3 | |||
>5 hectares | 4 | |||
Don't know | 5 | |||
income1 | Numeric | |||
Subsistence farming | 1 | |||
Tobacco | 2 | |||
Paid employment | 3 | |||
Other | 4 | |||
income2 | Numeric | |||
Subsistence farming | 1 | |||
Tobacco | 2 | |||
Paid employment | 3 | |||
Other | 4 | |||
income3 | Numeric | |||
Subsistence farming | 1 | |||
Tobacco | 2 | |||
Paid employment | 3 | |||
Other | 4 | |||
education_hh | What is the highest level of education completed by the household head? | Numeric | ||
No formal education | 1 | |||
Primary school | 2 | |||
Secondary school | 3 | |||
Higher | 4 | |||
education_woman | What is the highest level of education completed by the adult woman participant? | Numeric | ||
No formal education | 1 | |||
Primary school | 2 | |||
Secondary school | 3 | |||
Higher | 4 | |||
livestock | Does the household own any livestock? | Numeric | ||
Yes | 1 | |||
No | 2 | |||
milk_cows | Does the household own any milk cows/bulls? | Numeric | ||
None | 1 | |||
1 to 4 | 2 | |||
5 to 9 | 3 | |||
10+ | 4 | |||
other_cattle | Does the household own any other cattle? | Numeric | ||
None | 1 | |||
1 to 4 | 2 | |||
5 to 9 | 3 | |||
10+ | 4 | |||
mules | Does the household own any mules or donkeys? | Numeric | ||
None | 1 | |||
1 to 4 | 2 | |||
5 to 9 | 3 | |||
10+ | 4 | |||
goat | Does the household own any goats? | Numeric | ||
None | 1 | |||
1 to 4 | 2 | |||
5 to 9 | 3 | |||
10+ | 4 | |||
pigs | Does the household own any pigs? | Numeric | ||
None | 1 | |||
1 to 4 | 2 | |||
5 to 9 | 3 | |||
10+ | 4 | |||
chickens | Does the household own any chickens? | Numeric | ||
None | 1 | |||
1 to 9 | 2 | |||
10 to 29 | 3 | |||
30+ | 4 | |||
poultry | Does the household own any other poultry? | Numeric | ||
None | 1 | |||
1 to 9 | 2 | |||
10 to 29 | 3 | |||
30+ | 4 |