TABLE 1.

BRONCHOALVEOLAR LAVAGE CHARACTERISTICS AND/OR THE PRESENCE OF GROUND-GLASS OPACITY AT SCREENING

	BAL− Cohort (n = 40)	BAL+ Cohort (n = 101)	P Value*
BAL characteristics
Total cells/μl†	33.0 ± 31.1	27.3 ± 28.5	0.3065
BAL volume recovered, ml	131.6 ± 35.6	109.1 ± 41.8	0.0032
% PMNs	1.2 ± 0.7	8.4 ± 7.7	<0.0001
% Eosinophils	0.5 ± 0.4	3.9 ± 4.8	<0.0001
% Lymphocytes	4.7 ± 4.1	5.1 ± 6.5	0.7209
Screening HRCT
Percent with any GGO	100	84.2	0.0060
Percent with any RML GGO	26.3	41.2	0.1175

Definition of abbreviations: BAL = bronchoalveolar lavage; GGO = ground-glass opacity; HRCT = high-resolution computed tomography; PMNs = polymorphonuclear leukocytes; RML = right middle lobe.

BAL⁻ cohort defined as having less than 3% neutrophils and less than 2% eosinophils; BAL+ cohort defined as having 3% or more of neutrophils and/or 2% or more of eosinophils.

^*Two-tailed Student's t test or Fisher's exact test.

^†n = 38 for BAL⁻ and 94 for BAL⁺ cohorts due to missing data for total cell counts.