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Table 4 Relationships of baseline (A) and changes over 6 months (B) between quality of life scales and BMI, FEV1, physical activity measures, muscle power, and aerobic capacity

From: Quality of life is associated with physical activity and fitness in cystic fibrosis

A. Baseline

        
 

BMI

Body fat

FEV1

Reported activity

Measured MVPA

Muscle power

Wmax

VO2peak

Physical functioning

0.098

–0.08

0.264*

0.2

0.118

0.320**

0.237*

0.369**

Vitality

0.055

–0.043

–0.034

0.213

0.012

0.304**

0.145

0.201

Emotional state

0.014

–0.092

0.024

0.184

0.035

0.176

0.153

0.204

Social limitations

–0.033

0.082

–0.066

0.212

–0.182

–0.031

0.06

0.059

Role limitations

0.03

–0.207

0.176

0.292*

0.222

0.296*

0.195

0.315*

Feelings of embarrassment

0.065

0.148

0.161

0.155

0.021

–0.051

0.072

0.174

Body image

0.435***

0.306**

0.217

–0.029

0.068

–0.171

0.092

0.164

Eating disturbances

0.373**

0.117

0.141

–0.006

0.111

0.034

0.167

0.297*

Treatment burden

0.096

–0.027

0.046

0.066

–0.134

0.137

0.211

0.177

Health perception

0.18

–0.023

0.283*

0.187

0.163

0.13

0.284*

0.396***

Weight problems

0.491***

0.228*

0.147

–0.073

0.012

–0.08

0.350**

0.456***

Respiratory symptoms

0.027

0.114

0.302**

0.106

0.057

0.041

0.204

0.424***

Digestive symptoms

0.057

–0.074

0.096

0.099

0.183

0.245*

0.307**

0.376**

B. Changes over 6 months

        
 

Δ BMI

Δ Body fat

Δ FEV1

Δ Reported activity

Δ Measured MVPA

Δ Muscle power

Δ Wmax

Δ VO 2 peak

Δ Physical functioning

–0.013

0.02

0.026

0.044

–0.198

0.012

0.056

0.114

Δ Vitality*

0.189

0.16

0.094

0.227

–0.16

0.057

0.305*

0.176

Δ Emotional state

0.154

0.174

0.073

–0.027

–0.143

0.097

0.137

0.002

Δ Social limitations

–0.134

0.075

0.1015

–0.027

–0.11

0.051

0.13

0.243

Δ Role limitations

0.123

–0.078

–0.077

0.393**

0.124

0.192

0.307*

0.267

Δ Feelings of embarrassment

0.109

0.035

0.244*

0.389**

0.037

–0.025

0.219

0.255*

Δ Body image

0.1

0.139

0.148

0.195

0.012

0.178

–0.028

0.02

Δ Eating disturbances

0.066

0.19

0.21

0.089

0.091

0.171

0.067

0.048

Δ Treatment burden

0.133

0.029

–0.053

–0.094

–0.073

0.019

0.158

0.043

Δ Health perception

0.325**

0.156

0.191

–0.049

–0.24

–0.054

0.137

0.247*

Δ Weight problems

0.545***

0.19

0.162

0.345**

–0.189

–0.125

0.340**

0.366**

Δ Respiratory symptoms

0.177

0.015

0.205

0.069

–0.112

–0.104

0.041

0.112

Δ Digestive symptoms

–0.04

–0.081

0.027

–0.012

–0.039

–0.066

0.056

–0.004

  1. Data are Spearman rank correlation coefficients. A positive correlation indicates that a higher level of physical activity or fitness is associated with a better QoL.
  2. Abbreviations: MVPA moderate–and–vigorous physical activity, Wmax maximal aerobic power, VO2peak peak oxygen uptake.
  3. Significant correlation coefficients are highlighted by bold characters.
  4. *– p < 0.05; **– p < 0.01; ***– p < 0.001.