Table 2 Quality assessment of the included cross-sectional studies using the adopted Newcastle-Ottawa Scale (NOS)
From: Substance use disorders in Saudi Arabia: a scoping review
Selection | Comparability | Outcome | Total | |||||
|---|---|---|---|---|---|---|---|---|
Author | Representativeness of the sample (⋆) | Sample size (⋆) | Non-respondents (⋆) | Ascertainment of the exposure (risk factor) (⋆⋆) | (⋆⋆) | Assessment of outcome (⋆⋆) | Statistical test (⋆) | (*10) |
Alkhalaf et al., 2019 [46] | * | – | – | – | – | * | * | 3 |
Ibrahim et al., 2018 [7] | * | – | – | ** | – | – | – | 3 |
Almarhabi et al., 2018 [41] | * | * | – | – | * | ** | * | 6 |
Alshomrani, 2015 [36] | * | – | – | * | – | ** | * | 5 |
Khalil, 2011 [45] | – | – | – | ** | – | ** | * | 5 |
Alzahrani AJ et al., 2009 [37] | – | – | – | – | – | ** | – | 2 |
Bassiony, 2008 [28] | – | – | – | ** | – | * | * | 4 |
Alzahrani AJ, 2005 [39] | * | – | – | – | – | ** | – | 3 |
AbuMadini et al., 2008 [29] | * | – | – | ** | – | ** | * | 6 |
Abalkhail, 2001 [30] | * | – | – | – | – | ** | * | 4 |
Iqbal, 2000 [31] | * | – | – | ** | – | ** | – | 5 |
al-Nahedh, 1999 [32] | * | – | – | – | – | * | * | 3 |
Njoh and Zimmo, 1997 [40] | * | – | – | ** | – | ** | – | 5 |
Hafeiz, 1995 [33] | * | – | – | ** | – | * | – | 4 |
Osman, 1992 [17] | * | – | – | * | – | ** | – | 4 |
Qureshi, 1992 [34] | – | – | – | ** | * | ** | * | 6 |
Iqbal, 2001 [35] | – | – | – | ** | – | * | – | 3 |
Alzahrani H et al., 2015 [44] | * | * | – | – | * | ** | * | 6 |
Omer and Ezzat, 1999 [47] | – | – | – | * | – | * | * | 3 |