Table 2.

Correlation of single item quality of life with CF-QOL, anxiety and depression, FEV₁

CF-QOL scale	Single item quality of life scale	p-values
Physical functioning	r = 0.46	< 0.001
Social functioning	r = 0.51	< 0.001
Treatment issues	r = 0.41	< 0.001
Chest symptoms	r = 0.50	< 0.001
Emotional functioning	r = 0.61	< 0.001
Concerns about the future	r = 0.43	< 0.001
Interpersonal relationships	r = 0.56	< 0.001
Body image	r = 0.25	= 0.01
Carer concerns	r = 0.53	< 0.001
Total QOL score	r = 0.64	< 0.001
Anxiety	r = -0.50	< 0.001
Depression	r = -0.38	< 0.001
FEV1	r = 0.21	= 0.02

CF-QOL = Cystic fibrosis Quality of Life scale

FEV₁ = Forced expiratory volume in one second