Relationship between daily physical activity and aerobic fitness in adults with cystic fibrosis

BMC Pulmonary Medicine

Table 1 Anthropometric characteristics, pulmonary function and daily physical activities in patients with cystic fibrosis (CF) and in healthy control subjects

Characteristics	CF (n = 30)	Control (n = 15)	p-value
Male/Female	20/10	10/5	1
Age, yr	33 ± 9	29 ± 5	0.19
BMI, Kg/m²	22.5 ± 2.7	23.6 ± 3.1	0.23
Pulmonary function
FEV₁,L	2.65 ± 0.8	4.51 ± 0.96	<0.0001
FEV₁, % predicted	71 ± 19	109 ± 11	<0.0001
FEV₁/FVC, %	68 ± 11	83 ± 3	<0.0001
FVC, L	3.84 ± 1.05	5.35 ± 1.09	<0.0001
FVC, % predicted	86.4 ± 16.7	111 ± 9	<0.0001
TLC, % predicted	96.6 ± 16.3	104 ± 9	0.09
DL_CO, % predicted	80.2 ± 14	94 ± 11	0.002
MVC, L/min	105.9 ± 32	180.2 ± 38.5	<0.0001
Daily physical activity
Steps, number/day	9160.5 ± 3825.6	10591 ± 4024.6	0.25
Mild intensity activities, min/day	159 (100–246)	147 (77–205)	0.22
Moderate intensity activities, min/day	13 (9–29)	11 (7–16)	0.34
Vigorous intensity activities, min/day	1 (0–3)	1 (0–5)	0.94
Moderate + Vigorous intensity activities, min/day	16 (9–29)	12 (8–27)	0.43

Definition of abbreviations: CF = Cystic Fibrosis; BMI = body mass index; FEV₁ = forced expiratory volume in one second; % pred = % predicted; FVC = forced vital capacity; MVC = maximal ventilator capacity estimated as 40 × FEV₁; TLC = total lung capacity. Data are presented as mean ± SD or median (interquartile range), unless otherwise stated.

ISSN: 1471-2466