Table 5.
Quality assessment for 18 cohort studies
| Author | Selection | Comparability | Outcome | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Exposed cohort | Non-exposed cohort | Ascertainment of exposure | Outcome of interest not present at start | Main factors | Additional factors | Assessment of outcome | Follow-up long enough* | Adequacy of follow-up | ||
| Katsogridaki, Tzovaras [32] | * | * | * | 0 | * | * | 0 | 0 | * | 6 |
| Nance, Eagon [19] | * | * | * | 0 | * | * | * | * | * | 8 |
| Gero, Dib [20] | * | * | * | 0 | * | 0 | * | * | * | 7 |
| El Labban, Safadi [18] | * | 0 | * | 0 | * | * | * | * | * | 7 |
| Zerrweck, Zurita [16] | * | 0 | * | 0 | * | * | * | * | * | 7 |
| Billeter, Probst [25] | * | 0 | * | * | * | * | * | * | * | 8 |
| Papamargaritis [22] | * | 0 | * | * | * | * | * | * | * | 8 |
| Wang, [17] | * | * | * | 0 | * | 0 | * | * | * | 7 |
| Graham, Murty [5] | * | 0 | * | 0 | * | 0 | * | * | * | 6 |
| Gobato, Seixas Chaves [28] | * | 0 | * | * | * | 0 | * | * | 0 | 6 |
| Balsa [23] | * | 0 | * | 0 | * | * | * | * | * | 7 |
| Salle [24] | * | 0 | * | 0 | * | * | * | * | * | 7 |
| Madan, Orth [26] | * | 0 | * | 0 | 0 | 0 | * | * | * | 5 |
| Burge, Schaumburg [15] | * | 0 | 0 | 0 | 0 | * | * | 0 | 0 | 3 |
| Dalcanale, Oliveira [30] | * | 0 | * | 0 | * | * | * | * | * | 7 |
| Pech, Meyer [31] | * | 0 | * | * | * | * | * | * | * | 8 |
| Pires, Martins [29] | * | 0 | * | * | * | 0 | * | * | 0 | 6 |
| Tichansky, [6] | * | 0 | * | 0 | 0 | 0 | * | 0 | 0 | 3 |