Table 1.

Characteristics of respiratory specimens.

	PCR-negative	PCR-positive
Respiratory specimens
BAL	96	4 (4%)
Tracheal aspirates	116	7 (6%)
Sputum	134	5 (4%)
Median Age (range), years	62 (1–91)	74* (47–88)
Male / female	195 / 151	6 / 10

* p = 0.011, Mann-Whitney.