Results from the G-Study indicating the contribution of each source of variance
| Source of variance | Description | Estimated VC | Relative contribution % | Interpretation of results |
| Physicians | Systematic variation among physicians | 57.8 | 52.1 | Most of the variance derives from different competence levels between the physicians |
| Assessors | Systematic variability among assessors | 4.77 | 4.3 | The assessors had a high degree of agreement |
| Interaction between physician and assessor | Consistent trend for a assessor to access a particular physician differently | 2.08 | 1.9 | There was no bias between assessor and physician due to successful blinding |
| Interaction between cases and physicians | Systematic variability among cases | 12.30 | 11.1 | Some difference in the difficulty of the EBUS-TBNA cases |
| Interaction between case, assessor, and physician | All remaining variability | 34.11 | 30.7 | Expected unexplained error |
VC: variance component; EBUS-TBNA: endobronchial ultrasound-guided transbronchial needle aspiration.