Table 2.
Quality and bias assessment of included studies using MORE checklist
| OK n (%) | Minor flaws n (%) | Major flaws n (%) | Poor reporting n (%) | Total n |
|
|---|---|---|---|---|---|
| General descriptive elements | |||||
| Aim of study | |||||
| Incidence | 5 (83.3) | 0 (0) | 0 (0) | 1 (16.7) | 6 |
| Prevalence | 9 (90) | 0 (0) | 0 (0) | 1 (10) | 10 |
| Study design | 7 (63.6) | 0 (0) | 0 (0) | 4 (36.4) | 11 |
| Funding of study | 7 (63.6) | 0 (0) | 0 (0) | 4 (36.4) | 11 |
| Conflict of interest | 4 (36.4) | 2 (18.2) | 0 (0) | 5 (45.5) | 11 |
| Ethical approval | 5 (45.5) | 2 (18.2) | 0 (0) | 4 (36.4) | 11 |
| External validity | |||||
| Sampling | 3 (27.3) | 8 (72.7) | 0 (0) | 0 (0) | 11 |
| Assessment of sampling bias | 0 (0) | 1 (9.1) | 1 (9.1) | 9 (81.8) | 11 |
| Estimate bias | |||||
| Response rate | 2 (50) | 1 (25) | 0 (0) | 1 (25) | 4 |
| Exclusion rate | 0 (0) | 0 (0) | 1 (9.1) | 10 (90.9) | 11 |
| Addressment of sampling bias | 4 (36.4) | 0 (0) | 0 (0) | 7 (63.6) | 11 |
| Internal Validity | |||||
| Source of data | 4 (36.4) | 7 (63.6) | 0 (0) | 0 (0) | 11 |
| Validation | 11 (100) | 0 (0) | 0 (0) | 0 (0) | 11 |
| Incidence | |||||
| Type of incidence | 6 (100) | 0 (0) | 0 (0) | 0 (0) | 6 |
| Type of estimation | 3 (50) | 3 (50) | 0 (0) | 0 (0) | 6 |
| Reference period | 6 (100) | 0 (0) | 0 (0) | 0 (0) | 6 |
| Precision of estimate | 4 (66.7) | 0 (0) | 0 (0) | 2 (33.3) | 6 |
| Prevalence | |||||
| Type of prevalence | 1 (10) | 9 (90) | 0 (0) | 0 (0) | 10 |
| Type of estimation | 3 (30) | 7 (70) | 0 (0) | 0 (0) | 10 |
| Precision of estimate | 5 (50) | 0 (0) | 0 (0) | 5 (50) | 10 |
MORE checklist, methodological evaluation of observational research.