Table 1 Characteristics of primary studies compiled to meta-analysis: the association between oral hygiene indices and asthma
First author, publication year | Area study | Type study | Case (Asthma) | Control | Score of quality assessment | ||||
|---|---|---|---|---|---|---|---|---|---|
Sample size | Mean | SD | Sample size | Mean | SD | ||||
Ghasempoor 2005 [36]a | Babol | Case-control | 75 | 2.27 | 2.65 | 75 | 0.8 | 1.41 | 7 |
Bahrololoomi 2016 [29]a | Yazd | Case-control | 46 | 0.9 | 0.691 | 47 | 0.6 | 1.027 | 8 |
Khalilzadeh 2007 [33]a | Tehran | Case-control | 45 | 3.98 | 2.53 | 46 | 4.30 | 2.81 | 6 |
Hassanpour 2019 [31]a | Sabsevar | Case-control | 70 | 0.71 | 1.47 | 70 | 0.48 | 1.002 | 7 |
Amirabadi 2013 [28]b | Zahedan | Case-control | 100 | 3.1 | 2.1 | 100 | 1.14 | 1.2 | 7 |
Bahrololoomi 2017 [30]b | Yazd | Case-control | 46 | 4.15 | 3.27 | 47 | 5.25 | 2.25 | 8 |
Ehsani 2013 [32]b | Tehran | Case-control | 44 | 3.34 | 1.71 | 46 | 3.0 | 1.8 | 7 |
Hassanpour 2019 [31]b | Sabsevar | Case-control | 70 | 3.79 | 1.83 | 70 | 2.32 | 1.21 | 7 |
Salem 2018 [35]c | Rasht | Historical cohort | 73 | 0.87 | 0.34 | 73 | 0.87 | 0.32 | 8 |
Salem 2009 [34]c | Tehran | Case-control | 45 | 3.98 | 2.53 | 46 | 4.30 | 2.81 | 8 |