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Frequency of false positive results with two techniques for the indirect antiglobulin test. The probability that the two techniques do not differ is 28.9% (p=0.289; McNemar's test). (PLIS: tube test with PEG 1000 as a potentiator; ID: gel test).
| PLIS | ID | |
|---|---|---|
| + | − | |
| + | 12 | 6 |
| − | 2 | 1997 |
