Table 2.

Association between predefined variables and the probability of GBT (multivariate regression model).

Variable	Odds Ratio (95% confidence intervals)	P-value
Age (per year)	1.00 (0.98–1.02)	0.877
Male versus female	1.21 (0.67–2.20)	0.535
PN versus GP	1.52 (0.78–2.93)	0.216
COPD diagnosis	1.01 (0.54–1.91)	0.967