Table 2 Criteria list for assessment of the methodological quality of prospective cohort studies [20–22]
From: Is retirement good for your health? A systematic review of longitudinal studies
Criteriaa | I, V/Pb | % studies meeting the item | |
|---|---|---|---|
Study population and participation (baseline) | |||
1. | Adequate description of sampling frame, recruitment methods, period of recruitment, and place of recruitmentc | I | 64% |
2. | Participation rate at baseline at least 80%, or if the nonresponse was not selective | V/P | 23% |
3. | Adequate description of baseline study sample for key characteristicsc | I | 32% |
Study attrition | |||
4. | Provision of the exact n at each follow up measurement | I | 68% |
5. | Provision of exact information on follow-up duration | I | 95% |
6. | Response at short-term follow-up was at least 80% of the n at baseline and response at long-term follow-up was at least 70% of the n at baseline | V/P | 50% |
7. | Information on not selective nonresponse during follow-up measurementd | V/P | 18% |
Data collection | |||
8. | Adequate measurement of retirement status | V/P | 23% |
9. | Retirement status was assessed at a time prior to the measurement of the health outcome | V/P | 86% |
10. | Adequate measurement of the health outcome | V/P | 64% |
Data analyses | |||
11. | The statistical model used was appropriate and point estimates with measures of variability (CI or SE) have been provided | V/P | 59% |
12. | The number of cases was at least 10 times the number of the independent variables | V/P | 100% |
13. | Important confounders were identified and there has been adjusted for | V/P | 36% |
14. | No selective reporting of results | V/P | 91% |