Table 1.

Demographics of IPF patients

	All			Nonprogressor by 48 wk†			Progressor by 48 wk
	n	Mean	SD	n	Mean	SD	n	Mean	SD
Age, yr	54	64.27	8.19	32	63.89	9.24	21	64.38	6.36
Baseline FVC, %predicted	53	68.47	15.84	32	68.79	15.78	20	68.82	16.28
Baseline FEV1, %predicted	53	71.34	16.79	32	72.16	17.98	20	70.91	15.03
Baseline DlCO, %predicted	50	40.77	14.31	29	42.74	12.33	20	39.14	16.26
Baseline periostin, μg/ml	54	21.49	116.97	32	2.23	6.46	21	51.86	186.04

	n	No.	%	n	No.	%	n	No.	%
Male	54	39	72.22	32	24	75.00	21	15	71.43
History of smoking*	54	43	79.63	32	25	78.13	21	18	85.71

FVC, forced vital capacity; FEV₁, forced expiratory volume in 1 s; Dl_CO, diffusion capacity of the lung for CO.

^*Patient was a past or current smoker vs. never smoker.

^†One patient with only 6 mo of follow-up was excluded from progressor and nonprogressor demographic summary, since classification was unknown past 6 mo.