Kenya - Nairobi Urban Health and Demographic Surveillance System 2002-2010

Start	End	Cycle
2002-08-01	2002-09-27	Round 0
2002-10-16	2002-12-23	Round 1
2003-01-21	2003-04-06	Round 2
2003-05-04	2003-08-31	Round 3
2003-09-17	2003-12-23	Round 4
2004-01-23	2004-05-06	Round 5
2004-05-28	2004-09-20	Round 6
2004-09-25	2004-12-23	Round 7
2005-01-23	2005-06-06	Round 8
2005-06-14	2005-09-26	Round 9
2005-09-27	2005-12-24	Round 10
2006-01-13	2006-04-30	Round 11
2006-05-01	2006-08-31	Round 12
2006-09-01	2007-01-30	Round 13
2007-02-04	2007-05-27	Round 14
2007-05-29	2007-09-15	Round 15
2007-09-25	2007-12-31	Round 16
2008-01-01	2008-08-23	Round 17
2008-09-01	2008-12-31	Round 18
2009-01-01	2009-05-31	Round 19
2009-06-23	2009-09-20	Round 20
2010-01-20	2010-04-20	Round 22

Start	End	Cycle
2002-08-01		Release coverage

Proxy Respondent [proxy]
Interviews are conducted in Swahili (the country's national language), with translation into the local dialects in specific situations where the respondent is unable to understand Swahili.

A detailed 4-week training of enumerators was conducted at baseline. Currently, 3-5 days refresher trainings are conducted at the start of each new round of data collection

The field team constitutes 46 staff: 20 interviewers,6 quality control officers,7 team leaders, 2 supervisors, and 1 field coordinator.
On average a complete household interview takes between 30 minutes and 45 minutes.
Interviews took place everyday throughout the field work period, with teams being permitted to take only one day off per week. At baseline an interview took on average between 30 and 45 minutes to complete.

Prior to the baseline detailed community sensitization was undertaken, in latter rounds however community liaison has constituted, feedback barazas, and intervention activities targeted to address community health-related problems identified during the data collection. Intervention activities are carried out through piggy-back studies with targeted interventions, for example a maternal and child health study had a component of interventions to address mother and child health-complications, or through bi-annual health camps at which free medical treatment is provided for conditions identified as prevalent in the community during data collection.

A list of questionnaires administered in the Nairobi HDSS, and their description is available in the External Documents section.

Questionnaires are printed and administered in Swahili (The country's national language)

The questionnaires for the Nairobi HDSS were structured questionnaires based on the INDEPTH Model Questionnaire and were translated into Swahili with some modifications and additions.After an initial review the questionnaires were translated back into English by an independent translator with no prior knowledge of the survey. The back translation from the Swahili version was independently reviewed and compared to the English original. Differences in translation were reviewed and resolved in collaboration with the original translators.
The English and Swahili questionnaires were both piloted as part of the survey pretest.

At baseline a household questionnaire was administered in each household, which collected various information on household members including sex, age, relationship, and orphanhood status. In later rounds questionnaires to track the migration of the population observed at baseline, and additonal questionnaires to capture demographic and health events happening to the population have been introduced. See the Exernal resources section for samples of these questionnaires.

All questionnaires and modules are provided as external resources.

Name	Abbreviation	Affiliation
Statistics and Surveys Unit	SSU	African Population and Health Research Center

Interviewing is conducted by teams of interviewers. Each interviewing team comprised 3-4 interviewers, a field editor and a site supervisors.

The role of the supervisor is to coordinate field data collection activities, including management of the field teams, supplies and equipment, finances, maps and listings, coordinate with local authorities concerning the survey plan and make arrangements for accomodation and travel. Additionally, the field supervisor assigned the work to the interviewers, spot checked work, maintained field control documents, and sent completed questionnaires and progress reports to the central office.

The field editor is responsible for reviewing each questionnaire at the end of the day, checking for missed questionnaires, skip errors, fields incorrectly completed, and checking for inconsistencies in the data. The field editor also observed interviews and conducted review sessions with interviewers.

Responsibilities of the supervisors and field editors are described in the Instructions for Supervisors and Field Editors, together with the different field controls that were in place to control the quality of the fieldwork.