TABLE 1.

A comparison of clinic and remote measurements to assess COVID‐19 long‐term impact on lung function

Assessment type	Clinic measurements	Remote measurements	Considerations
Lung X‐ray or CT scan	Standard assessment for detecting lung tissue abnormalities	Not applicable
Spirometry	DLCO, FVC, FEV1	FVC, FEV1	Comparability between FEV1 clinic and remote measures has been demonstrated 10 ; data may be more variable due to an unsupervised test procedure
Pulse oximetry	Heart rate, SpO2	Heart rate, SpO2	Pulse oximeters with regulatory clearance ensure higher quality of data; validation on people with different skin tones is lacking.
Exercise challenge tests	Supervised CPET, 6MWT, 1‐min sit‐to‐stand test and the 40‐step test	Unsupervised 6MWT, 1‐min sit‐to‐stand test and the 40‐step test conducted by means of wearable sensors	Feasibility and patient safety should be considered carefully when deploying these tests at home

Abbreviations: 6MWT, 6‐minute walk test; COVID‐19, coronavirus disease 2019; CPET, cardiopulmonary exercise test; CT, computed tomography; DLCO, diffusion capacity for carbon monoxide; FEV1, forced expiratory volume in one second; FVC, forced vital capacity; SpO2, capillary blood oxygenation.