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Table 3 Results of the clustered lot quality assurance sampling surveys * to monitor measles vaccination coverage before the end of the campaign, Sierra Leone, November 2009

From: Intervene before leaving: clustered lot quality assurance sampling to monitor vaccination coverage at health district level before the end of a yellow fever and measles vaccination campaign in Sierra Leone in 2009

District

Lot

N

Vaccination Card-Verified§

Verbal History

U

D

SE

U

D

SE

Western Area Rural

1

50

4

A

0.04

0

A

0.00

Western Area Urban

2

50

7

A

0.07

0

A

0.00

Kambia

3

50

1

A

0.02

0

A

0.00

4

50

2

A

0.02

0

A

0.00

District Total

100

3

A

0.02

0

A

0.00

Koinadugu

5

50

11

R

0.07

1

A

0.02

6

50

16

R

0.18

8

R

0.07

District Total

100

27

R

0.09

9

A

0.03

Port Loko

7

50

18

R

0.21

15

R

0.16

8

50

5

A

0.06

5

A

0.06

9

50

11

R

0.15

10

R

0.15

District Total

150

34

R

0.09

30

R

0.08

Tonkolili

10

50

1

A

0.02

0

A

0.00

11

50

2

A

0.04

2

A

0.04

12

50

1

A

0.02

0

A

0.00

District Total

150

3

A

0.02

2

A

0.01

Bombali

13

50

6

A

0.06

1

A

0.02

Kenema

14

50

1

A

0.02

0

A

0.00

Kono

15

50

0

A

0.00

0

A

0.00

Kailahun

16

50

3

A

0.04

3

A

0.04

Moyamba

17

50

5

A

0.04

5

A

0.04

Bonthe

18

50

8

R

0.14

8

R

0.14

Bo

19

50

5

A

0.05

0

A

0.00

Pujehun

20

50

2

A

0.02

2

A

0.02

  1. N: sample size; U: number of Unvaccinated in the sample; D: Decision; A: Accepted; R: Rejected; SE: Standard Error of the distribution of the vaccination variable between the clusters in the lots.
  2. * Sampling plans used: UT = 90% and LT = 75%, with d = 7 when N = 50 (5x10); d = 15 when N = 100 (10x10); d = 25 when N = 150 (15x10).
  3. § Used to take operational decisions in the field before the end of the campaign.