Why FEV1 decline with ageing analyzed in longitudinal studies is twice higher that the decline with age analyzed in cross-sectional studies?

I have compared my data published in J Appl Physiol 108:1440-1446, 2010 with results showed by Elizabeth T Thomas et al. in BMJ Open 2019;9:e028150. doi:10.1136/bmjopen-2018-028150. Could anybody...

28 December 2019 1,017 4 View