Study | Selection | Comparability | Outcome assessment | Score |
---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
---|
Heung-Kwon | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
Whiteley | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 7 |
- According to the Newcastle-Ottawa scale: 1, the representativeness of the exposed cohort, 2, the choice of the non-exposed cohort, 3, the determination of the exposure, 4, no outcome to be studied in the cohort at the beginning of the study, 5, the control of confounding factors, 6, the determination of the outcome, 7, the follow-up time is long enough to observe the occurrence of the outcome, 8 sufficient follow-up rate