Baptista Peixoto Befecadu F, Stirnemann J, Guerreiro I, et al. PANDORA dyadic project: hope, spiritual well-being and quality of life of dyads of patients with chronic obstructive pulmonary disease in Switzerland – a multicentre longitudinal mixed-methods protocol study. BMJ Open 2023;13:e068340. doi: 10.1136/bmjopen-2022-068340
In this study protocol, the dependent and independent variables were mistakenly inverted in the figure and were not explicit in one sentence. However, the hypothesis and primary objectives remain unchanged.