. 2020 Dec 3;76(2):144–151. doi: 10.1136/thoraxjnl-2019-214375

Table 2.

Summary of correlations between pulmonary function tests and MRI metrics

Pulmonary function test	FWHM_mean			FWHM_IQR
Pulmonary function test	r	P value	95% CI	r	P value	95% CI
FVC	−0.22	0.310	−0.59 to 0.22	−0.14	0.529	−0.53 to 0.30
TL_CO	−0.41	0.054	−0.71 to 0.02	−0.46	0.026*	−0.74 to 0.05
K_CO	−0.42	0.047*	−0.71 to 0.01	−0.51	0.013*	−0.77 to 0.11
	Change in FWHM_mean			Change in FWHM_IQR
6-month change in FVC	0.02	0.949	−0.45 to 0.48	−0.34	0.154	−0.70 to 0.15
6-month change in TL_CO	0.16	0.537	−0.35 to 0.59	0.07	0.791	−0.43 to 0.53
6-month change in K_CO	−0.39	0.095	−0.72 to 0.07	−0.10	0.695	−0.54 to 0.39

* Designates p-value < 0.05

FVC, forced vital capacity; FWHM, full width at half maximum; FWHM_IQR, IQR of the FWHM; FWHM_mean, mean FWHM; K_CO, diffusing coefficient of the lungs for carbon monoxide; TL_CO, diffusing capacity of the lungs for carbon monoxide.