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Table 3 Quality of observational studies included in the review of rotavirus vaccine effectiveness. Using the Newcastle-Ottawa Scale

From: Population effectiveness of the pentavalent and monovalent rotavirus vaccines: a systematic review and meta-analysis of observational studies

Study No.

Study

Country

Study design

Selection

Comparability

Outcome / exposure

Overall

Bias

1

Bellido-Blasco et al. 2012 [22]

Spain

Case-control

3

2

3

8

Low

2

Braeckman et al. 2012 [32]

Belgium

Case-control

3

2

3

8

Low

3

Carvalho-Costa et al. 2009 [25]

Brazil

Case-control

2

0

1

3

High

4

Castilla et al. 2012 [31]

Spain

Case-control

3

2

3

8

Low

5

Correia et al. 2010 [35]

Brazil

Case-control

3

1

3

8

Moderate

6

Cortese et al., 2011 [36]

USA

Case-control

3

2

3

8

Low

7

Cortese et al. 2013 [37]

USA

Case-control

3

2

3

8

Low

8

Cotes-Cantillo et al. 2014 [29]

Colombia

Case-control

3

2

3

8

Low

9

de Palma et al. 2010 [38]

El Salvador

Case-control

3

2

3

8

Low

10

Desai et al. 2010 [39]

USA

Case-control

3

2

2

7

Low

11

Donauer et al. 2013 [45]

USA

Case-control

2

2

2

6

Low

12

Guh et al. 2011 [40]

USA

Case-control

4

1

3

9

Moderate

13

Ichihara et al. 2014 [41]

Brazil

Case-control

3

2

2

7

Moderate

14

Justino et al. 2011 [33]

Brazil

Case-control

4

2

3

9

Low

15

Martinon-Torres et al. 2011 [24]

Spain

Case-control

4

0

2

6

High

16

Mast et al. 2011 [16]

Nicaragua

Case-control

3

2

1

7

Moderate

17

Muhsen et al. 2010 [42]

Israel

Case-control

3

2

1

6

Moderate

18

Patel et al. 2009 [26]

Nicaragua

Case-control

4

2

3

9

Low

19

Patel et al. 2012 [27]

Nicaragua

Case-control

4

2

2

8

Low

20

Patel et al. 2013 [43]

Bolivia

Case-control

3

2

3

8

Low

21

Payne et al. 2013 [28]

USA

Case-control

3

2

2

7

Low

22

Snelling et al. 2009 [44]

Australia

Case-control

3

2

3

8

Low

23

Staat et al. 2011 [34]

USA

Case-control

3

2

2

7

Low

24

Eberly et al. 2011 [23]

USA

Cohort

3

0

3

6

High

25

Fontes-Vieira et al. 2011 [17]

Brazil

Cohort

3

0

2

5

High

26

Muhsen et al. 2011 [18]

Israel

Cohort

3

1

3

7

Moderate

27

Nolan et al. 2012 [19]

USA

Cohort

4

2

3

9

Low

28

Panozzo et al. 2014 [30]

USA

Cohort

4

2

3

9

Low

29

Wang et al. 2010 [20]

USA

Cohort

4

1

3

8

Moderate

30

Wang et al. 2013 [21]

USA

Cohort

4

1

3

8

Moderate