Table 2 NOS Checklist for selected studies (case-control study)
From: Polyomaviruses and the risk of breast cancer: a systematic review and meta-analysis
Study (First author (year)) Cross-sectional (Total ten scores) | Selection | Total scores | Comparability | Total scores | Exposure | Total scores | Total scores for all | Level | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Is the case definition adequate? (1) | Representativeness of the cases (1) | Selection of Controls (1) | Definition of Controls (1) | Comparability of cases and controls on the basis of the design or analysis (2) | Ascertainment of exposure (1) | Same method of ascertainment for cases and controls (1) | Non-Response rate (1) | ||||||
Razieh Dowran | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 5 | Satisfactory |
Hua-chuan Zheng | 1 | 0 | 0 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 3 | 6 | Satisfactory |
Amina Gihbid | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 5 | Satisfactory |
Harithabdual sahibsharrif | 1 | 0 | 0 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 3 | 6 | Satisfactory |