Table 2.
Quality scores of included studies according to Newcastle-Ottawa Quality Assessment Scale (NOS) for cohort studies.
| Author (Year) | Selection (****) | Comparability (**) | Outcome (***) | Total Score | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5a | 5b | 6 | 7 | 8 | ||
| Campos et al.(2018) [14] | * | * | * | * | 4 | |||||
| Costa et al. (2018) [36] | * | * | * | 3 | ||||||
| Germa et al.(2016) [44] | * | * | * | * | * | 5 | ||||
| Lopes-Freire et al. (2015) [15] | * | * | * | * | * | 5 | ||||
| Peres et al. (2015) [39] | * | * | * | * | * | * | 6 | |||
| Chen et al. (2015) [38] | * | * | * | * | 4 | |||||
| Sum et al. (2015) [18] | * | * | * | * | 4 | |||||
| Agarwal et al. (2014) [45] | * | * | * | * | 4 | |||||
| Limeira et al. (2014) [37] | * | * | * | * | * | * | 6 | |||
| Moimaz et al. (2014) [46] | * | * | * | * | * | * | 6 | |||
| Caramez da Silva et al. (2012) [35] | * | * | * | * | * | 5 | ||||
| Thomaz et al. (2012) [47] | * | * | * | * | * | 5 | ||||
| Jabbar et al. (2011) [2] | * | * | * | * | * | 5 | ||||
| Romero et al.(2011) [3] | * | * | * | * | 4 | |||||
| Sanchez-Molins et al. (2010) [48] | * | * | * | * | 4 | |||||
| Castelo et al. (2010) [49] | * | * | * | * | * | 5 | ||||
| Peres et al. (2007) [33] | * | * | * | * | * | * | 6 | |||
| Viggiano et al. (2004) [10] | * | * | * | * | * | 5 | ||||
Description of NOS points: (1) Representativeness of the exposed cohort. (2) Selection of the non-exposed cohort. (3) Ascertainment of exposure. (4) Demonstration that outcome of interest was not present at start of study. (5) Comparability of cohorts on the basis of the design or analysis, (5a) for one factor and (5b) for additional factor. (6) Assessment of outcome. (7) Duration of follow-up period. (8) Adequacy of follow-up.