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Comparison of specificities of ELISA SARS-CoV-2 IgM detection before and after urea dissociation
| Control | No. of cases | % specificity (no. of cases showing indicated level of ELISA specificity/total no. of cases) |
|
|---|---|---|---|
| Before dissociation | After dissociation | ||
| RF-IgM negative | 36 | 100.00 (36/36) | 100.00 (36/36) |
| RF-IgM positive | 36 | 38.89 (14/36) | 91.67 (33/36)a |
| Total | 72 | 69.44 (50/72) | 95.83 (69/72)a |
P < 0.001 (compared with results determined before dissociation).
