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Table 2 Quality assessment of included studies—cohort study and case–control study

From: Early exposure to infections increases the risk of allergic rhinitis—a systematic review and meta-analysis

Author Year

Study population selection

Intergroup comparability

Outcome measurement

Total points

Mai 2009 [25]

4

1

2

7

Lin 2015 [23]

4

2

2

8

Thomson 2010 [21]

2

1

2

5

Mckeever 2002 [15]

4

2

2

8

Macintyre 2010 [24]

4

2

1

7

Illi 2014 [33]

4

1

2

7

Ramsey 2007 [22]

3

1

2

6

Hsieh 2016 [35]

4

2

3

9

Mckeever 2002 [34]

4

2

2

8

Kang 2019 [32]

4

1

1

6

Bremner 2008 [16]

3

2

2

7

Liao 2015 [37]

4

1

1

6

Harris 2007 [26]

4

2

2

8

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BMC Pediatrics

ISSN: 1471-2431

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