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Comparison of false negative rate among the four groups.
| Control group | χ2 | P-value |
|---|---|---|
| A (BWC) | ||
| B (BAL) | 0.079 | 0.778 |
| C (EBUS-TBNA) | 7.370 | 0.007 |
| D (TBLB) | 0.527 | 0.468 |
| B (BAL) | ||
| C (EBUS-TBNA) | 5.690 | 0.017 |
| D (TBLB) | 0.168 | 0.682 |
| C (EBUS-TBNA) | ||
| D (TBLB) | 4.234 | 0.040 |
BWC, bronchoscopic washing cultures; BAL, bronchoalveolar lavage; EBUS-TBNA, endobronchial ultrasound-guided transbronchial needle aspiration; TBLB, transbronchial lung biopsy.
