Table 3.

Mean ± standard error values of FVC%, DLCO% and 6MWD for subgroups defined by UCSD scores

	Group 1 score < 26 N=44	Group 2 26 ≤ score ≤ 57 N=94	Group 3 score > 57 N=40	p values
FVC%	60.3±2.2	57.3±1.5	53.0±2.1	Overall effect < 0.0001 1 vs. 2 = 0.09 1 vs. 3 = 0.01 2 vs. 3 = 0.26
DLCO%	27.8±1.0	26.5±0.6	24.7±0.9	Overall effect < 0.0001 1 vs. 2 = 0.11 1 vs. 3 = 0.01 2 vs. 3 = 0.23
6MWD (meters)	335.2±17.3	260.6±11.3	212.2±16.5	Overall effect <0.0001 1 vs. 2 = 0.01 1 vs. 3 < 0.0001 2 vs. 3 = 0.0004

FVC%=percent predicted forced vital capacity; DLCO%=percent predicted diffusing capacity of the lung for carbon monoxide; 6MWD=distance walked during six-minute walk test; UCSD=University of California San Diego Shortness of Breath Questionnaire