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. Author manuscript; available in PMC: 2013 Apr 3.
Published in final edited form as: Lung Cancer. 2011 Nov 22;76(2):248–252. doi: 10.1016/j.lungcan.2011.10.009

Table 2.

Association between six-minute walk distance and survival (n = 118).

Analysis Six-minute walk distance (m)
 Likelihood ratio Ptrend
<358.5 358.5–450 >450
No. of events 31 25 21
No. at risk 39 42 37
Median, 6MWD 283 90–356.8 416 358.5–450 510 452–640
Median, months 8.98 6.09–12.70 14.38 11.38–21.05 20.26 11.78–28.91
Unadjusted, HR Referent 0.53 0.31–0.90 0.44 0.25–0.78 0.003
Adjusted,a HR Referent 0.60 0.35–1.04 0.54 0.30–0.99 0.036
Adjusted,b HR Referent 0.61 0.34–1.07 0.48 0.24–0.93 0.025

Abbreviations: 6MWD, six-minute walk distance; HR, hazard ratio.

a

Adjusted for performance status (ECOG).

b

Adjusted for age, gender, cohort, and performance status (ECOG).