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. 2013 Jan 17;143(6):1671–1678. doi: 10.1378/chest.12-0161

Table 5.

—SGRQ Change Scores for Subjects Stratified Into Quartiles Based on Change From Baseline to 12 Months in Anchor Values

Anchor Symptoms P Value Activity P Value Impacts P Value Total P Value
FEV1 .01 .006 .16 .01
 ≤ −11.2% (Q1) −0.12 ± 14.6 .017 −1.71 ± 8.76 .06 0.95 ± 12.1 .025 −0.13 ± 7.98 .006
 −11.2% to −3.4% (Q2) 1.45 ± 13.1 .015 1.31 ± 9.84 .004 −0.34 ± 9.96 .17 0.34 ± 8.16 .01
 −3.4% to 4.4% (Q3) 4.57 ± 21.4 .002 3.26 ± 8.43 .001 −2.30 ± 13.1 .24 0.66 ± 10.0 .007
 > 4.4% (Q4) −13.4 ± 14.6 Ref −6.46 ± 8.20 Ref −6.25 ± 12.8 Ref −7.53 ± 10.0 Ref
Dlco .6 .5 .6 .6
 ≤ −9.9% (Q1) −3.74 ± 15.2 .736 0.65 ± 8.57 .418 −1.83 ± 13.1 .363 −1.29 ± 8.42 .388
 −9.9% to −4.7% (Q2) 2.27 ± 18.5 .193 0.06 ± 8.28 .559 −2.06 ± 10.1 .582 −0.82 ± 8.58 .402
 −4.7% to 4.7% (Q3) −1.02 ± 15.9 .438 −3.14 ± 9.75 .522 −3.15 ± 11.7 .687 −2.92 ± 9.98 .789
 > 4.7% (Q4) −4.60 ± 20.1 Ref −1.04 ± 11.1 Ref −2.20 ± 13.9 Ref −2.07 ± 11.8 Ref
6MWD .7 .02 .17 .04
 ≤ −2.3% (Q1) −1.03 ± 17.9 .400 2.87 ± 7.73 .05 1.81 ± 11.9 .233 2.02 ± 9.18 .06
 −2.3% to 4.5% (Q2) 2.54 ± 22.7 .241 0.97 ± 6.53 .37 −0.75 ± 9.35 .662 0.34 ± 7.99 .36
 4.5% to 17.1% (Q3) −3.32 ± 14.5 .449 −5.41 ± 10.8 .26 −6.56 ± 14.8 .301 −5.88 ± 10.2 .33
 > 17.1% (Q4) −5.53 ± 11.9 Ref −2.22 ± 10.7 Ref −2.60 ± 11.4 Ref −2.88 ± 9.41 Ref
Log(VEGF-D) .04 .8 .5 .16
 ≤ −9.0% (Q1) −7.54 ± 15.3 .7 −2.22 ± 8.43 .602 −5.97 ± 16.1 .452 −5.17 ± 11.6 .437
 −9.0% to −3.7% (Q2) −2.70 ± 18.4 .4 −2.48 ± 9.75 .859 −0.78 ± 11.6 .628 −1.51 ± 10.1 .440
 −3.7% to 0.8% (Q3) 6.29 ± 17.9 .02 1.43 ± 9.65 .625 2.76 ± 11.5 .505 2.95 ± 9.03 .158
 > 0.8% (Q4) −4.88 ± 12.8 Ref 0.14 ± 10.8 Ref −3.27 ± 8.49 Ref −2.44 ± 5.86 Ref

Values are mean ± SD. Boldface numbers are P values for comparison across SGRQ means within anchor; other P values correspond to pairwise comparisons of SGRQ means with anchor using Q4 as the reference. See Table 1 legend for expansion of abbreviations.