Agreement in the identification of microcrystals for the senior observer in samples with crystals depending on the number of fields needed in the reference sample (disagreement shown in bold and underlined)
| Reference | DMSO+ | DMSO− | |||||
|---|---|---|---|---|---|---|---|
| Crystal negative | MSU | CPP | Crystal negative | MSU | CPP | ||
| 1–3 fields | MSU | 0 | 8 | 0 | 1 | 7 | 0 |
| CPP | 0 | 0 | 9 | 3 | 0 | 6 | |
| > 6 fields | CPP | 0 | 0 | 1 | 1 | 0 | 0 |
Agreement kappa: 1.00 for detection of crystals in DMSO+ simples; kappa: 0.62 for detection of crystals in DMSO− samples