Table 1 Data regarding the Newcastle–Ottawa Scale for assessing the quality of the non-randomized studies
From: Efficacy of direct-to-operating room trauma resuscitation: a systematic review
Study | Selection | Comparability | Outcome | Total score | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Is the case definition adequate | Representativeness of the cases | Selection of controls | Definition of controls | On the main factor | On other risk factors | Assessment of exposure | Same method of ascertainment for cases and controls | Non-response rate | ||
Wieck et al. [5] | * | * | – | * | * | * | * | * | – | 7/9 |
Steele et al. [6] | * | * | – | * | * | – | * | * | – | 6/9 |
Rhodes et al. [7] | * | * | – | * | * | – | * | * | – | 6/9 |
Martin et al. [8] | * | * | – | * | * | – | * | * | – | 6/9 |
Johnson et al. [9] | * | * | – | * | * | * | * | * | – | 7/9 |
Habarth-Morales et al. [10] | * | * | – | * | * | * | * | * | – | 7/9 |