Delphi criteria
| Aim of the Delphi | Identify consensus. |
| Consensus definition | ≥80% agreement on the same rating. |
| Rating scale | Qualitative, ranging from ‘1 - not relevant’ to ‘5 - totally relevant’. |
| Number of rounds | Four rounds (consensual QPIs were withdrawn from subsequent rounds) (experts comments were added in each round). |
| Specialist panel | Homogeneous group recruited from Portuguese APLs, according to inclusion criteria. |
| Data collection and analysis | Online questionnaire on the Microsoft Forms platform. Data analysed using Microsoft Excel. Comments verified according to the content analysis technique. |
APLs, anatomical pathology laboratories; QPIs, quality and performance indicators.