Table 3:

Demographic and Clinical Characteristics of IPF Subjects Stratified by Plasma CXCL13 Levels

	Lowest CXCL13	Highest CXCL13
N	71	24
Age, yr	69 ± 1 (69, 53–84)	69 ± 2 (72, 51–82)
Sex, % male	76	67
Lung biopsy, %	56	50
FVC % predicted	67 ± 2 (67, 31–126)	61 ± 4 (59, 25–97)
DlCO % predicted	51 ± 2 (50, 20–109)	46 ± 5 (44, 14–91)
Smoking history, %	55	48

Definitions of abbreviations: CXCL13 = C-X-C motif chemokine 13; Dl_CO = diffusing capacity of carbon monoxide; IPF = idiopathic pulmonary fibrosis.

Highest CXCL13 denotes those subjects with IPF with mediator values in the highest quartile. Data are depicted as means ± SE, and in parenthesis (median, minimum-to-maximum ranges). None of these characteristics differed significantly between the two subpopulations.