‘I know what I should be feeding my child’: foodways of primary caregivers of Child Support Grant recipients in South Africa
6 June 2022
Motivational determinants of physical activity in disadvantaged populations with (pre)diabetes: a cross-cultural comparison
7 June 2022
Staff inolved: MyLinh Duong, Salim Yusuf, Thandi Puoane and colleagues
Portable spirometers are commonly used in longitudinal epidemiological studies to measure and track the forced expiratory volume in first second (FEV1) and forced vital capacity (FVC). During the course of the study, it may be necessary to replace spirometers with a different model.
This raise questions regarding the comparability of measurements from different devices. We examined the correlation, mean differences and agreement between two different spirometers, across diverse populations and different participant characteristics.