Table 3.

Hospitalisation and GAP index stage at baseline

Baseline GAP index	Patientsa	Patients with hospitalisations	Hospitalisations per patient hospitalised	Duration of hospitalisation (days)
Stage I	493 (48.6)	65 (13.2)	1.2 ± 0.5	10.4 ± 11.8
Stage II	455 (44.9)	75 (16.5)	1.1 ± 0.4	10.1 ± 12.0
Stage III	65 (6.4)	14 (21.5)	1.2 ± 0.4	14.7 ± 19.2

Data are presented as N (%) or mean ± SD

DL_CO diffusing capacity of the lung for carbon monoxide (CO), GAP gender-age-physiology, SD standard deviation

^aOne patient had a missing DL_CO reading, which was assumed to be missing at random, not that the patient could not perform the test