Table 4. Proportions of different Infection status in patients with or without pre-test suspicion of infection.

Patient categorization based on BAL culture results	With pre-test suspicion for infection, n (%)	Without pretest suspicion for infection, n (%)	Pearson chi square test
Primary infection	21 (24.1)	20 (14.6)	P*=0.199
Possible infection/colonization	23 (26.4)	44 (32.1)
Culture negative	44 (50.6)	72 (52.6)
Total	88	136

*, Pearson chi square test was applied to all three groups simultaneously. P>0.05 (we cannot reject the null hypothesis that there is no difference between the distribution among the three groups). BAL, bronchoalveolar lavage.