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Fig. 1 | Respiratory Research

Fig. 1

From: Understanding the impact of symptoms on the burden of COPD

Fig. 1

a Time of day when COPD symptoms are worse than usual. Reproduced from [17]; b prevalence of any COPD symptoms during each part of the 24-h day, according to COPD severity. Reproduced from [3]. *p < 0.001 vs ‘midday’, ‘afternoon’, ‘evening’, ‘night’, and ‘difficult to say’ groups; p = 0.006 vs ‘no particular time of day’ (all COPD patients); p < 0.001 vs ‘midday’. COPD chronic obstructive pulmonary disease

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