. Author manuscript; available in PMC: 2021 Feb 1.

Published in final edited form as: Respir Med. 2020 Jan 11;162:105878. doi: 10.1016/j.rmed.2020.105878

Table 3.

Multivariable-adjusted, zero-inflated Poisson model examining the association between randomization group and COPD AEs.

	Rate Ratio [95% CI]	P-value
Randomization group (reference = pedometer alone)	0.51 [0.31, 0.85]	0.01
FEV₁% predicted	0.99 [0.97, 1.0]	0.14
Season of enrollment (reference = Winter)
Spring	0.73 [0.32, 1.68]	0.46
Summer	0.29 [0.12, 0.72]	7.1 × 10⁻³
Fall	1.02 [0.53, 1.95]	0.95
Current smoking status at enrollment (reference = not currently smoking)	1.08 [0.66, 1.80]	0.74
Binary (yes/no) history of AEs in year prior to enrollment (reference = no AEs)	1.26 [1.09, 1.54]	2.8 × 10⁻³