Table 2.
Newcastle–Ottawa Scale for assessing the quality of no-cohort studies
| No-cohort studies
|
Selection
|
Comparability
|
Exposure
|
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Study | Is the case definition adequate? | Representativeness of the cases | Selection of controls | Definition of controls | Main factor: Child-Pugh class | Secondary factor: etiology | Ascertainment of exposure | Same method of ascertainment for cases and controls | Nonresponse rate | Total quality score |
| Fan et al (2001)20 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | 7 | ||
| Niguma et al (2005)22 | Yes | Yes | Yes | Yes | Yes | Yes | 6 | |||
| Cheng et al (2005)26 | Yes | Yes | Yes | Yes | Yes | 5 | ||||
| Liang et al (2008)21 | Yes | Yes | Yes | Yes | Yes | Yes | Yes | 7 | ||
| Zhou et al (2011)19 | Yes | Yes | Yes | Yes | Yes | Yes | 6 | |||
| Ma et al (2013)25 | Yes | Yes | Yes | Yes | Yes | Yes | 6 | |||