From: Swallowing transit times and valleculae residue in stable chronic obstructive pulmonary disease
 |  | COPD | Control | ||||
---|---|---|---|---|---|---|---|
 |  | VEF1 | BMI | PTT | VEF1 | BMI | PTT |
PTT | r | .201 | .760 | Â | .045 | .022 | Â |
p-value | .395 | .751 | Â | .850 | .928 | Â | |
TBC | r | .359 | .185 | .311 | .080 | .365 | .582 |
p-value | .120 | .429 | .183 | .736 | .113 | .007* |