Table 1

Participant characteristics by respondent

	Respondent
	Adolescent	Adult	OR or η²	p Value	Mothers*	Fathers*	OR or η²	p Value
Sample size	1286	4739			3127	975
Age, mean (SD), years	14.84 (1.69)	28.87 (9.54)	0.32	<0.001	8.90 (5.08)	8.52 (5.14)	<0.01	0.040
Female (%)	669 (53)	2271 (48)	1.14	0.044	1558 (50)	460 (47)	1.14	0.075
BMI, mean (SD)	19.54 (3.11)	21.87 (3.54)	0.07	<0.001	17.47 (2.99)	17.28 (2.92)	<0.01	0.102
FEV₁ percent predicted, mean (SD)	83.78 (23.44)	62.32 (24.51)	0.12	<0.01	89.23 (21.55)	90.74 (22.13)	<0.01	0.112
Haemoptysis or pneumothorax in 6 months (%)	35 (3)	657 (14)	0.21	<0.001	37 (1)	9 (1)	0.98	0.969
Currently on intravenous antibiotics (%)	156 (12)	733 (16)	0.50	<0.001	299 (10)	118 (12)	1.22	0.146
Listed for transplant (%)	7 (1)	243 (5)	0.09	<0.001	12 (0.4)	1 (0.1)	–	–
Currently on psychiatric medication for depression/anxiety (%)	44 (4)	466 (10)	0.29	<0.001	59 (2)	9 (0.9)	1.95	0.231
Currently receiving psychotherapy for depression/anxiety (%)	70 (6)	379 (8)	0.63	0.001	103 (3)	19 (2)	1.23	0.526
Positive scores (%)					Caregivers
HADS-D	60 (5)	609 (13)	0.30	<0.001	618 (20)	173 (18)	1.15	0.142
CES-D	87 (19)	488 (29)	0.53	<0.001	1057 (34)	240 (25)	1.58	<0.001
Either HADS-D or CES-D	130 (10)	913 (19)	0.39	<0.001	1165 (37)	305 (31)	1.34	<0.001
HADS-A	281 (22)	1503 (32)	0.60	<0.001	1496 (48)	343 (36)	1.70	<0.001

*Characteristics of younger patients whose parents completed the screening. The amount of variability across strata was estimated using η² for continuous variables. ORs comparing younger with older participants and Mothers with Fathers, were used to index the size of the differences between the strata.
HADS, Hospital Anxiety and Depression Scale; CES-D, Center for Epidemiologic Studies-Depression Scale; BMI, body mass index.