Table 2.
Overview of changes in COSMIN standards
| Standarda | Short description of standard | Description of change |
|---|---|---|
| IRT 1 | IRT model | Deleted, reporting issue |
| IRT 2 | Software package | Deleted, reporting issue |
| IRT 3 | Method of estimation | Deleted, reporting issue |
| IRT 4 | Assumptions and item fit | Assumptions deleted, reporting issue; item fit/DIF moved to the box Cross-cultural validity\measurement invariance |
| A1 | Effect indicators | Not RoB/standard, included for reviewer’s information |
| A2 | % Missing item | Deleted, not RoB |
| A3 | Handling missings | Deleted, not RoB |
| A4 | Sample size | Deleted, not RoB |
| A5 | Check unidimensionality | Deleted, redundant due to new order |
| A6 | Sample size | Deleted, redundant due to new order |
| B1 | % Missing item | Deleted, not RoB |
| B2 | Handling missings | Deleted, not RoB |
| B3 | Sample size | Deleted, not RoB |
| B4 | Two measurements available | Not RoB |
| B5 | Independent administrations | Deleted, does not discriminate between studiesb |
| B6 | Time interval stated | Deleted, not RoB |
| C1 | % Missing item | Deleted, not RoB |
| C2 | Handling missings | Deleted, not RoB |
| C3 | Sample size | Deleted, not RoB |
| C4 | Two measurements available | Deleted, not RoB |
| C5 | Independent administrations | Deleted, does not discriminate between studiesb |
| C6 | Time interval stated | Deleted, not RoB |
| Percentage agreement | Removed from poor-reliability method to excellent measurement error method | |
| E1 | Effect indicators | Not RoB/standard, but included for reviewer’s information |
| E2 | % Missing item | Deleted, not RoB |
| E3 | Handling missings | Deleted, not RoB |
| E4 | Sample size | Four-point rating scale adapted |
| F1 | % Missing item | Deleted, not RoB |
| F2 | Handling missings | Deleted, not RoB |
| F3 | Sample size | Deleted, not RoB |
| F4 | Hypotheses formulated | Deleted, not RoB |
| F5 | Direction | Deleted, not RoB |
| F6 | Magnitude | Deleted, not RoB |
| F7 | Description of comparator instrument | Formulation adapted |
| F8 | Description of measurement properties | Formulation adapted |
| Description characteristics of subgroups | Newly added | |
| G1 | % Missing item | Deleted, not RoB |
| G2 | Handling missings | Deleted, not RoB |
| G3 | Sample size | Four-point rating scale adapted |
| G4-G11 | Translation process | Deleted, not RoB |
| H1 | % Missing item | Deleted, not RoB |
| H2 | Handling missings | Deleted, not RoB |
| H3 | Sample size | Deleted, not RoB |
| I1 | % Missing item | Deleted, not RoB |
| I2 | Handling missings | Deleted, not RoB |
| I3 | Sample size | Deleted, not RoB |
| I4 | Longitudinal design | Deleted, not RoB |
| I5 | Time interval stated | Deleted, not RoB |
| I6 | Anything occurred | Deleted, not RoB |
| I7 | Proportion patients changed | Deleted, not RoB |
| I8 | Hypotheses formulated | Deleted, not RoB |
| I9 | Direction | Deleted, not RoB |
| I10 | Magnitude | Deleted, not RoB |
| I11 | Description of comparator instrument | Formulation adapted |
| I12 | Description of measurement properties | Formulation adapted |
| Description characteristics of subgroups | Newly added |
RoB risk of bias, DIF differential item functioning
aStandard number refers to original numbering of items [5]
bUsually all studies scored excellent on this item