1. Training Workshop – Module 2
Coverage Evaluation for Preventive Chemotherapy Description of the method
Training Workshop – Module 2

2. Phases of a Coverage Evaluation
Module 1: Planning (central level)
Survey Area, Survey Population, Sample Size,
Selection of Subunits
Module 2: Implementation (local level)
Creating segments, enumerating households, interviewing respondents
Module 3: Interpretation and Action (central level)
Interpretation of results, developing action plan

3. Coverage evaluation: MODULE 2: The implementation phase
Note, this is the aspect of training that is relative to the survey enumerators

4. Coverage Evaluation Survey Team
Survey Coordinator - leads survey planning and supervises the teams in the field Field teams – typically 3 people (not directly involved in MDA) Interviewer – interviewing respondents and completing the survey questionnaire Sampler - makes sure sampling plan is followed and determines which households are selected Driver – transports team to each subunit site *Local Guide – person from subunit identified to help team identify households in the segment
It is helpful if one or more team members is familiar with the local area
Must speak local language
Team members should be independent of the MDA

5. Field Team Supplies
List of selected subunits and the number of segments in each (from CSB)
Lists A and B
Chalk
Questionnaire
Sample of drug(s)
Notebook (scrap paper to record HHs needing revisit and for selecting segments randomly)
Map (optional)

6. Overview of Daily Sampling Flow
Arrive at subunit, introduce team and purpose to local leaders
Identify a local guide
Familiarize team with the boundaries of the subunit
Divide the subunit into the predetermined number of segments
Randomly select one segment
Work with the guide to enumerate houses and identify a path through the segment
Flip a coin to determine if List A or B will be used
Walk path through segment, enumerating each HH. Each HH that corresponds to a number on the selected list (A or B) will be included in the survey
List all members of the survey population in each household and then interview each member on the list using the questionnaire
Continue until all HHs in the segment have been enumerated

7. Upon Arrival in the Selected Subunit
Introduce team and purpose to local leaders
Identify a local guide
Knows the areas and speaks the local language
Not directly involved in the MDA
Familiarize yourself with the boundaries of the subunit

8. Divide the Subunit into Segments
4. Divide the subunit into the predetermined number of segments and assign a number to each segment.
Selected Subunits
Subunit Names
Estimated # Households
# Segments to be formed per Subunit 1
Mbuwambuwa 49 2
Meleka 46 3
Garden 4
Zalimu 1 75 5
Njera 37 6
Chikaloza
158 7
Kamwendo
113 8
Khwalala
122

9. Divide Subunit into Segments
Segmentation Pointers:
Each segment should have approximately the same number of households.
Ask local leaders to help divide their community into “X equal parts” (e.g. half, thirds, fourths)
Use natural lines of division (e.g. roads, stream, path, or other landmarks) whenever possible
If the subunit only has 1 segment, the entire subunit will serve as the segment; there is no need for segmentation
Even if the estimated # households turns out to be very inaccurate, do not adjust the number of segments.

10. Divide the Subunit into Segments● ⌂
Stream
Path
Imaginary line
Large tree
Household
School

11. Divide the Subunit into Segments● ⌂
Walking route
Stream
Path
Imaginary line
Large tree
Household
School
SEGMENT 1
SEGMENT 2

12. Divide the Subunit into Segments
The goal of segmentation is to save time.
If villages are not segmented then the team would have to enumerate all households in the village and then randomly pick those to sample.
Instead, by segmenting the team only has to enumerate all the households in a single segment of the village.

13. Divide the Subunit into Segments

14. Maps (aka “sketch maps”)
Sometimes the village leader or health post may have a map of the village. These maps are often helpful in determining the best boundaries for each segment and identifying a path through the selected segment.

15. Divide the Subunit into Segments
Complete Exercise 2.1

16. Daily Sampling Flow
Arrive at subunit, introduce team and purpose to local leaders
Identify a local guide
Familiarize team with the boundaries of the subunit
Divide the subunit into the predetermined number of segments
Randomly select one segment

17. Randomly Select One Segment
If there is one segment…
No selection needed
Flip a coin
If there are two segments…
Draw numbers from a hat
If there are >2 segments…

18. Select Households within the Segment
6. Work with the local guide to determine a route through the selected segment that will pass by each household
Households within the segment are selected for the coverage survey by applying a set sampling interval (calculated in advance in order to reach the expected sample size).
Revisit Exercise 1.3 – what was your sampling interval?

19. Select Households within the Segment
List A
List B 3 1 7 5 12 9 16 14 20 18 25 22 29 27 33 31 38 36 42 40 47 44 51 49 55 53 60 57
7. Flip a coin to determine if List A or List B will be used.
The numbers on the list correspond to the household numbers (e.g., the 3rd, 7th, 12th households…) from which all individuals in the survey population should be sampled.

20. Select Households within the Segment
Walk path through segment, enumerating each HH. Each HH that corresponds to a number on the selected list (A or B) will be included in the survey

21. 3 4 39 38
6 people 40 41 2 5
5 people 42 1 33
2 people 7 6
4 people
4 people 8 43 12 29 11 10
3 people
8 people 9 20 25 16
9 people
6 people
5 people

22. Select Households within the Segment
Complete Exercise 2.2

23. Interview all Members of the Survey Population
List all members of the survey population in each household and then interview each member on the list using the questionnaire
Introduce team and explain purpose of survey to the head of household
Get the consent of the head of household
List the names of everyone in the survey population on the questionnaire
Interview each individual using the questionnaire (note: parents may be interviewed on behalf of children <10)
Show each respondent an example of the drug(s) that were offered

24. Interview all Members of the Survey Population
Key Coverage Questions:
Were you offered the drug?
Did you swallow the drug?
Measures Programme Reach Coverage
Measures Surveyed Coverage

25. Should be adjusted to reflect local norms and attitudes
Explain importance of swallow vs. offer

26. Interview all Members of the Survey Population
Absent Individuals
If a survey respondent is absent but expected to return the same day, the survey team should make note of the household and return once the segment is complete.
If the survey respondent is not expected to return, try to reach them via cell phone. If that is not possible, an adult in the household may serve as a proxy respondent and answer on behalf of the absent individual.

27. Interview all Members of the Survey Population
Complete Exercise 2.3 and Exercise 2.4

28. Summary: Daily Sampling Flow
Arrive at subunit, introduce team and purpose to local leaders
Identify a local guide
Familiarize team with the boundaries of the subunit
Divide the subunit into the predetermined number of segments
Randomly select one segment
Work with the guide to enumerate HH and identify a path through the segment
Flip a coin to determine if List A or B will be used
Walk path through segment, enumerating each HH. Each HH that corresponds to a number on the selected list (A or B) will be included in the survey
List all members of the survey population in each household and then interview each member on the list using the questionnaire
Continue until all HHs in the segment have been enumerated