Overview of the PNG National Micronutrient Survey

Overview of the PNG National Micronutrient Survey

Steps for survey workers

Training Travel to clusters Introduction to local leaders Selection of households Visiting households

• Consent

• Interviews

• Anthropometric measurements

• Laboratory testing and collection of specimens

Sampling - Definition

What is sampling?

Sampling is the process of selecting a number of subjects from all the subjects in the population.

Sampling - Definition

A sample is the selected subset of subjects.

What is a sample?

Sampling - Purpose

Why do sampling?

Sample because we cannot measure every person in the population.

Sampling - Goal

What is the goal of sampling?

The goal of sampling is to estimate some measure in the larger population.

Sampling - Goal

What is necessary to achieve this goal?

To estimate some measure in the larger population, the sample must be representative of that larger population.

Sampling - Goal

Regardless of the sampling method, if the sample is not representative, it tells you nothing about the population.

Remember this point!

Sampling

Why don't we weigh and measure every child and woman in Papua New Guinea?

Sampling

Population of Papua New Guinea (2000 census)

726,680 children less than 5 years of age

1,298,503 women 15-49 years of age

13 women and 13 children per day per team with 6 teams would take 16,648 days or

45.6 years

Sampling

How do we select households to include in the survey?

Random sampling

Sampling

Selecting individuals or households so that no person has any

influence on which individuals or households are selected.

What is random sampling?

Regions of Papua New Guinea

Southern

Momase

Highlands

Island

2-stage sampling

Region of PNG

CU 1 CU 8CU 2 CU 3 CU 4 CU 5 CU 6 CU 7

HH 1 HH 2 HH 3 HH 4 HH 5 HH 6 HH 7 HH 8 HH 9 HH 10 HH 11 HH 12 HH 13

HH 14 HH 15 HH 16 HH 17 HH 18 HH 19 HH 20 HH 21 HH 22 HH 23 HH 24 HH 25

List of all census units in PNG

Selected census units

Selecting households

How do we select households in each selected census unit?

Make list of all households in census unit Randomly select the number of households

needed Visit each selected household

Simple random sampling

Household

Smith

Pfeiffer

Anderson

Timmer

Huff

Hunt

Parvanta

Grummer-Strawn

Bobrow

Cooper

Random number table

7678 2352 6959 1937 2554 6804 9098 4316 4318 2346 7276 1880 7136 9603 0163 3152 7000 2865 8357 4475 9804 0042 1106 7949 2932 9958 9582 2235 1140 1164 7841 1688 4097 8995 5030 1785 5420 0125 4953 1332 5540 6278 1584 4392 3258 1374 1617 7427

Number

1

2

3

4

5

6

7

8

9

0

(Draw sample of 5 people)

Simple random sampling

Household

Smith

Pfeiffer

Anderson

Timmer

Huff

Hunt

Parvanta

Grummer-Strawn

Bobrow

Cooper

Random number table

7648 2352 6959 1937 2554 6804 9098 4316 4318 2346 7276 1880 7136 9603 0163 3152 7000 2865 8357 4475 9804 0042 1106 7949 2932 9958 9582 2235 1140 1164 7841 1688 4097 8995 5030 1785 5420 0125 4953 1332 5540 6278 1584 4392 3258 1374 1617 7427

Number

1

2

3

4

5

6

7

8

9

0

(Draw sample of 5 people)

Simple random sampling (select 20 households)

1 Iwais M

2 Teiaba C

3 Marau G

4 Aaron L

5 Oksen V

6 Pinpin B

7 Mabong P

8 Ngatia T

9 Gunure N

10 Agua C

11 Mogina W

12 Aulakua W

13 Wasoraba C

14 Zonggonau M

15 Tobena M

16 Mabong F

17 Yaman H

18 Bagita J

19 Baria M

20 Harekin J

21 Awalum E

22 Douna B

23 Guba V

24 Posou P

25 Huape H

26 Makaen J

27 Veia D

28 Hainapa B

29 Narakine G

30 Haung E

31 Tito M

32 Pasi N

33 Kapua K

34 Tulia R

35 Koddy F

36 Tulia E

37 Tripp K

38 Bowen B

39 Temple V

40 Bowen B

Simple random sampling (select 20 households)

1 Iwais M

2 Teiaba C

3 Marau G

4 Aaron L

5 Oksen V

6 Pinpin B

7 Mabong P

8 Ngatia T

9 Gunure N

10 Agua C

11 Mogina W

12 Aulakua W

13 Wasoraba C

14 Zonggonau M

15 Tobena M

16 Mabong F

17 Yaman H

18 Bagita J

19 Baria M

20 Harekin J

21 Awalum E

22 Douna B

23 Guba V

24 Posou P

25 Huape H

26 Makaen J

27 Veia D

28 Hainapa B

29 Narakine G

30 Haung E

31 Tito M

32 Pasi N

33 Kapua K

34 Tulia R

35 Koddy F

36 Tulia E

37 Tripp K

38 Bowen B

39 Temple V

40 Bowen B

Random number table

3640 2352 6959 1937 2554 6804 9098 4316 4318 2346 7276 1880 7136 9603 0163 3152 7000 2865 8357 4475 9804 0042 1106 7949 2932 9958 9582 2235 1140 1164 7841 1688 4097 8995 5030 1785 5420 0125 4953 1332 5540 6278 1584 4392 3258 1374 1617 7427 3320 8788 7658 9615 9862 7960 8140 6807 8077 2065 2560 2091 8921 0970 3134 8441

Simple random sampling (select 20 households)

1 Iwais M

2 Teiaba C

3 Marau G

4 Aaron L

5 Oksen V

6 Pinpin B

7 Mabong P

8 Ngatia T

9 Gunure N

10 Agua C

11 Mogina W

12 Aulakua W

13 Wasoraba C

14 Zonggonau M

15 Tobena M

16 Mabong F

17 Yaman H

18 Bagita J

19 Baria M

20 Harekin J

21 Awalum E

22 Douna B

23 Guba V

24 Posou P

25 Huape H

26 Makaen J

27 Veia D

28 Hainapa B

29 Narakine G

30 Haung E

31 Tito M

32 Pasi N

33 Kapua K

34 Tulia R

35 Koddy F

36 Tulia E

37 Tripp K

38 Bowen B

39 Temple V

40 Bowen B

Random number table

3640 2352 6959 1937 2554 6804 9098 4316 4318 2346 7276 1880 7136 9603 0163 3152 7000 2865 8357 4475 9804 0042 1106 7949 2932 9958 9582 2235 1140 1164 7841 1688 4097 8995 5030 1785 5420 0125 4953 1332 5540 6278 1584 4392 3258 1374 1617 7427 3320 8788 7658 9615 9862 7960 8140 6807 8077 2065 2560 2091 8921 0970 3134 8441

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Selected households

Simple random sampling (select 20 households)

1 Iwais M

2 Teiaba C

3 Marau G

4 Aaron L

5 Oksen V

6 Pinpin B

7 Mabong P

8 Ngatia T

9 Gunure N

10 Agua C

11 Mogina W

12 Aulakua W

13 Wasoraba C

14 Zonggonau M

15 Tobena M

16 Mabong F

17 Yaman H

18 Bagita J

19 Baria M

20 Harekin J

21 Awalum E

22 Douna B

23 Guba V

24 Posou P

25 Huape H

26 Makaen J

27 Veia D

28 Hainapa B

29 Narakine G

30 Haung E

31 Tito M

32 Pasi N

33 Kapua K

34 Tulia R

35 Koddy F

36 Tulia E

37 Tripp K

38 Bowen B

39 Temple V

40 Bowen B

1 Tulia E

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Selected households

Random number table

3640 2352 6959 1937 2554 6804 9098 4316 4318 2346 7276 1880 7136 9603 0163 3152 7000 2865 8357 4475 9804 0042 1106 7949 2932 9958 9582 2235 1140 1164 7841 1688 4097 8995 5030 1785 5420 0125 4953 1332 5540 6278 1584 4392 3258 1374 1617 7427 3320 8788 7658 9615 9862 7960 8140 6807 8077 2065 2560 2091 8921 0970 3134 8441

Simple random sampling (select 20 households)

1 Iwais M

2 Teiaba C

3 Marau G

4 Aaron L

5 Oksen V

6 Pinpin B

7 Mabong P

8 Ngatia T

9 Gunure N

10 Agua C

11 Mogina W

12 Aulakua W

13 Wasoraba C

14 Zonggonau M

15 Tobena M

16 Mabong F

17 Yaman H

18 Bagita J

19 Baria M

20 Harekin J

21 Awalum E

22 Douna B

23 Guba V

24 Posou P

25 Huape H

26 Makaen J

27 Veia D

28 Hainapa B

29 Narakine G

30 Haung E

31 Tito M

32 Pasi N

33 Kapua K

34 Tulia R

35 Koddy F

36 Tulia E

37 Tripp K

38 Bowen B

39 Temple V

40 Bowen B

1 Tulia E

2 Bowen B

3 Guba V

4 Baria M

5 Tripp K

6 Huape H

7 Aaron L

8 Mabong F

9 Bagita J

10 Marau G

11 Iwais M

12 Tito M

13 Hainapa B

14 Mogina W

15 Pinpin B

16 Narakine G

17 Pasi N

18 Douna B

19 Koddy F

20 Haung E

Selected households

Random number table

3640 2352 6959 1937 2554 6804 9098 4316 4318 2346 7276 1880 7136 9603 0163 3152 7000 2865 8357 4475 9804 0042 1106 7949 2932 9958 9582 2235 1140 1164 7841 1688 4097 8995 5030 1785 5420 0125 4953 1332 5540 6278 1584 4392 3258 1374 1617 7427 3320 8788 7658 9615 9862 7960 8140 6807 8077 2065 2560 2091 8921 0970 3134 8441

Householdlisting form

Cluster Number

HOUSEHOLD

NUMBER NAME OF HEAD OF HOUSEHOLD

PAPUA NEW GUINEA NATIONAL NUTRITION SURVEY HOUSEHOLD L ISTING

Cluster controlform

Random number table

Possible problems

Problem Village too small (has less

than 20 households)

Village too big to make household list

Solution Include as many

households as possible

• Add next closest village Segmentation before

listing

stream

church

Sea

Hotel

factory

HighwaySchool

factory

stream

church

Sea

Hotel

factory

HighwaySchool

factory

150

120

170

190 40

70

130

220

60

SEGMENT A

SEGMENT G

SEGMENT I

SEGMENT H

SEGMENT E

SEGMENT D

SEGMENT C

SEGMENT B

SEGMENT F

Random number from random number table - 0163

Segment Population Cumulative population

Range

Segment A 150 150 0-150

Segment B 190 320 151- 320

Segment C 170 490 321-490

Segment D 120 610 490 - 610

Segment E 130 740 611 - 740

Segment F 70 810 741 - 810

Segment G 40 850 811 - 850

Segment A 220 1070 851 - 1070

Segment I 60 1130 1071 - 1130

Who to include in the survey

All children 6-59 months of age in selected households

All women 15-49 years of age in every second household

All men 18 years of age and above in every second household

How to tell which householdsto enroll womenand men

Sampling

Team leaders will receive more detailed training in household sampling

Procedures in each household

Introduceyourself

Obtainconsents

Interviewhead of HH

Interviewmother

Interviewman

Measurewomen, men, and children

Collectlab

specimens

Processlab

specimens

Clean up and depart

What if no one is at home?

Ask neighbors or others where family is If family gone temporarily, return later If family still not home, return again the next day If family not home on third visit, complete

household checklist "Not at home"

Culturally Diverse Pictures for Use in Various Training Settings

Introduce yourself to household

Interview

Interview

Interview

Interview

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Anthropometric measurements

Collecting laboratory specimens

Collecting laboratory specimens

Collecting laboratory specimens

Collecting laboratory specimens

Blood spots on filter paper

Collecting laboratory specimens

Collecting laboratory specimens

Logistics

Travel by air to outlying areas Focal point in each province will maintain stock of

supplies and equipment Teams should carry enough supplies for 3 clusters Return to focal point when need resupply