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. 2021 Jan 11;160(1):135–138. doi: 10.1016/j.chest.2020.12.057

Figure 1.

Figure 1

Changes in CAT score before and during COVID-19 lockdown. A generalized additive model with penalized cubic regression spline assessing the association between the change of CAT (outcome) and baseline CAT score (predictor). The shaded area corresponds to 95% CIs. CAT = COPD Assessment Test.