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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.