Physical Activity Levels Are Low in Inoperable Lung Cancer: Exploratory Analyses from a Randomised Controlled Trial.

BACKGROUND

In inoperable lung cancer, evidence is limited regarding physical activity (PA) and associations with other outcomes.

AIMS

in the usual care (UC) group of an RCT to (1) explore whether baseline PA was associated with improved follow-up outcomes, (2) identify baseline variables associated with higher follow-up PA and in all RCT participants, to (3) analyse patterns of objectively measured PA, and (4) report on characteristics of those who were able to maintain or increase PA levels.

METHODS

exploratory analyses of an assessor-blinded RCT. Outcomes, assessed at baseline, nine weeks and six months, included PA (seven-days of accelerometry), six-minute walk distance (6MWD), muscle strength, symptoms, mood and health-related quality of life (HRQoL).

RESULTS

92 participants were randomised, 80 completed baseline accelerometry (39 intervention group (IG), 41 UC), characteristics: mean (SD) age 63.0 (12.3) years, 56% male, 51% stage IV disease. Baseline PA: median (IQR) steps/day 2859.6 (2034.0-3849.2) IG versus 3195.2 (2161.2-4839.0) UC. Associations between baseline PA and six-month outcomes were significant for HRQoL and 6MWD. PA at six months was significantly associated with baseline age, 6MWD and quadriceps strength. Between-group change score (steps/day) mean differences (95% CI) at nine weeks (174.5 (-1504.7 to 1853.7), = 0.84) and six months (574.0 (-1162.3 to 2310.3), = 0.52).

CONCLUSIONS

further research is required to determine patient subgroups deriving the greatest benefits from PA interventions.