Table 2.
ROBINS-I assessment of the included references—domain 1 pre-intervention confounding; domain 2 selection bias; domain 3 classification of intervention; domain 4 post-intervention confounding; domain 5 missing data; domain 6 bias in measurement; domain 7 reporting bias. Overall risk of bias assessment 0, No information; 1, low; 2, moderate; 3, serious;4, critical; EC NPI; V, ventilation, O, occupancy; ACD, air cleaning device; D, disinfection; S, screens.
| study | domain 1 | domain 2 | domain 3 | domain 4 | domain 5 | domain 6 | domain 7 | EC NPI |
|---|---|---|---|---|---|---|---|---|
| Li et al. [10] | 3 | 3 | 3 | 3 | 2 | 2 | 2 | V |
| Oginawati et al. [11] | 4 | 1 | 1 | 2 | 2 | 3 | 2 | V,O |
| Walshe et al. [12] | 3 | 2 | 3 | 3 | 2 | 1 | 2 | V,O |
| Ou et al. [13] | 3 | 2 | 2 | 3 | 2 | 2 | 2 | V |
| Pakora et al. [14] | 4 | 3 | 3 | 4 | 3 | 4 | 2 | V |
| Nabirova et al. [15] | 4 | 3 | 3 | 3 | 3 | 4 | 2 | V |
| Baumgarte et al. [16] | 4 | 3 | 2 | 4 | 2 | 3 | 2 | V,O |
| Gettings et al. [17] | 4 | 3 | 3 | 4 | 3 | 4 | 2 | V,ACD,S |
| Feathers et al. [18] | 3 | 2 | 4 | 3 | 2 | 4 | 2 | V |
| Dancer et al. [19] |  |
2 | 4 | 3 | 2 | 4 | 2 | V |
| Guedes et al. [20] | 4 | 3 | 3 | 4 | 3 | 4 | 2 | V,D |
| Wang et al. [21] | 4 | 3 | 3 | 4 | 3 | 4 | 2 | V,D |
| Atnae et al. [22] | 4 | 3 | 2 | 4 | 3 | 4 | 2 | D |
| Kerai et al. [23] | 4 | 3 | 3 | 4 | 3 | 4 | 2 | D |
| Telford et al. [24] | 4 | 3 | 3 | 4 | 3 | 3 | 2 | O,D |
| Szablewski et al. [25] | 4 | 3 | 3 | 4 | 2 | 2 | 2 | O |
| Cheng et al. [26] | 4 | 4 | 4 | 4 | 2 | 3 | 2 | ACD,O |
| Fischer et al. [27] | 1 | 1 | 1 | 2 | 2 | 1 | 2 | ACD |
| Zhang et al. [28] | 1 | 1 | 1 | 2 | 2 | 1 | 2 | ACD |