Table 2

Summary of remote data measurements during the 3-week study period

Non-smoking controls
(n=11)
PRISm
(n=15)
Smoking controls
(n=72)
GOLD 1
(n=9)
GOLD 2
(n=36)
GOLD 3
(n=24)
GOLD 4
(n=13)
P value
Physical activity
Median [IQR] steps per day*5038 [3744–5721]3156 [2198–4036]5585 [3429–8784]2182 [1601–7144]2338 [1437–4608]1420 [870–3753]544 [321–1249]<0.001
Median [IQR] calories per day*2074 [1615–2387]1521 [1147–2427]1896 [1509–2333]1447 [1020–1633]1952 [1364–2238]1625 [1232–1938]1190 [735–1308]0.006
Mean PROactive Rasch Difficulty Score98 (4.1)85.9 (17.8)87.3 (12.3)76.5 (11.7)70.9 (16.3)74.6 (13.4)63 (14.5)<0.001
Daily symptoms
Mean E-RS:COPD Total Score3.9 (1.6)8.4 (6.6)7.2 (4.2)9.9 (4.1)11.1 (5.5)11.8 (6.6)15.8 (6)<0.001
EXACT-defined events0 (0%)1 (7%)1 (1%)1 (11%)3 (8%)2 (8%)1 (8%)0.550
Rescue medication n/a (n=2)(n=9)(n=2)(n=22)(n=15)(n=8)
Mean rescue inhaler use (occasions per day)n/a0.1 (0.1)0.7 (1.0)0.2 (0.1)1.3 (1.7)2.5 (2.5)1.6 (1.7)0.150
  • Higher PROactive Rasch Difficulty score means less difficulty (0-100 scale).

  • *Steps and calories based on participants with ≥7 days with 8 or more hours of wear time.

  • E-RS:COPD, evaluating respiratory symptoms in chronic obstructive pulmonary disease; EXACT, EXAcerbations of Chronic pulmonary disease Tool; GOLD, Global Initiative for Chronic Obstructive Lung Disease; IQR, Inter-quartile range.