The UNHCR Standardized Expanded Nutrition Surveys (SENS) were conducted in three refugee camps located in Kigoma region, the western part of Tanzania. There were a total of 207,394 refugees residing in the three camps, where among them 62% are Burundians, 37.9% are Congolese and a small proportion of refugees from other nationalities (Yemen, Rwanda, Uganda, Sudan, Kenya and others).
A total of 45,704 under five children are located in the three camps with 26,756 in Nyarugusu camp.
The main objective of the SENS was to assess the general health and nutrition status of refugees and formulate workable recommendations for appropriate nutritional and public health interventions.
The survey was conducted using a two-stage cluster sampling. This study is an anonymized version of the collected data.
Kind of Data
Sample survey data [ssd]
Unit of Analysis
Individuals and households
v2.1: Edited, cleaned and anonymised data
Children between 6-59 months: Demographic profiling, nutritional status, anthropometry, health and anaemia.
Children between 0-23 months: Nutritional status, breastfeeding conditions.
Women between 15-49 years: anthropometry, health and anaemia
Households: food security, mosquito net coverage, demographic profiling.
Health and Nutrition
Nyarugusu (Congolese) Refugee Camp, Kasulu district
All refugees living in camp
Producers and sponsors
Minister of Health
Tanzania Food and Nutrition centre
Tanzania Red Cross Society
Medecins sans Frontieres
Medical Teams International
The survey was conducted using a two-stage cluster sampling. The sample size calculation for the refugee population living in Nduta was based on the PROGRESS population data. The sample size for children 6-59 months was calculated using the Standardized Monitoring and Assessment of Relief and Transitions
Sample weights were calculated for each of the data files.
Sample weights for the household data were computed as the inverse of the probability of selection of the household, computed at the sampling domain level (urban/rural within each region). The household weights were adjusted for non-response at the domain level, and were then normalized by a constant factor so that the total weighted number of households equals the total unweighted number of households.
Dates of Data Collection
Data Collection Mode
Data Collection Notes
Data were collected using mobile phones operated by the Android operating system (LG) and the ODK application. During supervision in the field and at the end of each day, the survey consultant and the supervisors manually check the phone questionnaires for completeness, consistency and accuracy. This check also used to provide feedback to the teams to improve data collection as the surveys progressed. Children data were downloaded and analysed on a daily basis with the ENA software (ENA for SMART 2011, July 9th, 2015). The SMART plausibility report was generated daily in order to identify any problems with anthropometric data collection such as flags and digit preference for age, height and weight, to improve the quality of the anthropometric data collected as the survey was on-going.
A quick check on Haemoglobin concentration among children and non-pregnant women was conducted during quality check. This was done by checking the disparities of number of subjects with low Hb level amongst the teams and feedback was provided for necessary correction among blood sample takers where applicable.
See primary investigators
UNHCR, UNICEF, Minister of Health, Tanzania Food and Nutrition centre, Tanzania Red Cross Society, Medecins sans Frontieres, World Vision, Medical Teams International (2021). Tanzania: Standardized Expanded Nutrition Survey (SENS) in Kigoma Refugee Camps: Nyarugusu Congolese - Sept/October 2021. Accessed from: https://microdata.unhcr.org