This dataset contains household data examining the impact of multi-storey gardens and frass fertilizer on household food insecurity, expenditure on vegetables, food consumption expenditure, consumption per adult equivalent. A cluster randomized trial (CRT) was used, including two treatments: (T1) multi-storey gardens (MSG) for planting vegetables including starter material and training on how to use, and (T2) MSG combined with BSFFF from recycled household waste, including starter material and training on use.

Data contains personal data

Yes

Type of personal data

Age, gender, occupation, region, district, number of household members

Language

English

Method and outcome

Unit of analysis

Household

Population

Households from Kibera informal settlement in Nairobi, Kenya

Time Method

Longitudinal

Sampling procedure

Probability

This dataset belongs to a study that uses a cluster randomized trial (CRT) to investigate the impact of urban farming and using black soldier fly frass fertilizer (BSFFF) from recycled household waste for urban farming on food and nutrition security. The proposed interventions include two treatments: (1) multi-storey gardens (MSG) for planting vegetables including starter material and training on how to use (T1), and (2) MSG combined with BSFFF from recycled household waste, including starter material and training on use (T2).

We conducted a CRT in 150 enumeration areas (EAs) in six sub-locations that form the administrative boundary of the Kibera informal settlement. They included Kibera, Lindi, Makina, Gatwekera, Olympic/Kianda, and Laini Saba. Randomization was stratified according to sub-locations using a central computerized process. We recruited 25 EAs from the six sub-locations through the village elders and community health volunteers. The goal was to recruit 6 households from each of the 150 EAs to provide a sample size of at least 900 households. We conducted a mapping exercise and enrolled the households in May 2023. We than conducted the baseline in June 2023, and implemented the treatments in June and July. The endline was conducted in November 2023.

Randomization was performed at the enumeration area level because MSGs are relatively large and can serve several households. First, we identified all 150 enumeration areas within 6 sublocation in Kibera. We then randomly divided the 150 enumeration areas into three such that 50 enumeration areas received MSG (group 1), 50 enumeration areas received MSG and BSFF (group 2), and the remaining 50 enumerations areas were control group (group 3). We administered surveys to assess whether treatment and control groups had similar characteristics. We implemented MSG in every household in a treatment enumeration area (groups 1 and 2) and BSFFF was administered to all households within the BSFF treated enumeration area (group 2).
Within treatment enumeration areas, we offered the chance of every household installing MSG to grow their own vegetables.

Randomization of MSG across enumeration areas allows estimation of the overall effect of MSG on dietary and economic outcomes by comparing treatment and control enumeration areas, even in the presence of within-enumeration area externalities. Show less..

Time period(s) investigated

2023-07-06 – 2023-10-30

Variables

241

Number of individuals/objects

789

Weighting

Age, gender, education,

Response rate/participation rate

87%

Households that participated in both the baseline and endline.

Data format / data structure

Numeric

Text

Data collection

Mode of collection: Interview
Description of the mode of collection: Data was collected using Computer-Assisted Personal Interviews. Instruments were programmed and data collected by tablets or mobile phones.
Data collector: University of Gothenburg
Instrument: (Questionnaire) - Endline survey instrument
Instrument: Baseline survey instrument (Questionnaire) - Baseline survey instrument - June 07 - June 09 2023
Number of responses: 789
Cause of non response - No contact/refusal: 62
Cause of non response - Respondent unable to participate: 49
Source of the data: Population group